prefix params cases to dflt- while templates are not set to dlft anymore

src/params/default/arrow-function.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/arrow-function/params-dflt-
+path: language/expressions/arrow-function/params-
 name: arrow function expression
 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
 es6id: 14.2.16

src/params/default/cls-decl-gen-meth-static.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/class/params-dflt-gen-meth-static-
+path: language/statements/class/params-gen-meth-static-
 name: static class expression generator method
 esid: sec-runtime-semantics-bindingclassdeclarationevaluation
 es6id: 14.5.15

src/params/default/cls-decl-gen-meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/class/params-dflt-gen-meth-
+path: language/statements/class/params-gen-meth-
 name: class expression method
 esid: sec-class-definitions-runtime-semantics-evaluation
 es6id: 14.5.16

src/params/default/cls-decl-meth-static.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/class/params-dflt-meth-static-
+path: language/statements/class/params-meth-static-
 name: static class expression method
 esid: sec-runtime-semantics-bindingclassdeclarationevaluation
 es6id: 14.5.15

src/params/default/cls-decl-meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/class/params-dflt-meth-
+path: language/statements/class/params-meth-
 name: class expression method
 esid: sec-runtime-semantics-bindingclassdeclarationevaluation
 es6id: 14.5.15

src/params/default/cls-expr-gen-meth-static.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/class/params-dflt-gen-meth-static-
+path: language/expressions/class/params-gen-meth-static-
 name: static class expression generator method
 esid: sec-class-definitions-runtime-semantics-evaluation
 es6id: 14.5.16

src/params/default/cls-expr-gen-meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/class/params-dflt-gen-meth-
+path: language/expressions/class/params-gen-meth-
 name: class expression method
 esid: sec-class-definitions-runtime-semantics-evaluation
 es6id: 14.5.16

src/params/default/cls-expr-meth-static.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/class/params-dflt-meth-static-
+path: language/expressions/class/params-meth-static-
 name: static class expression method
 esid: sec-class-definitions-runtime-semantics-evaluation
 es6id: 14.5.16

src/params/default/cls-expr-meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/class/params-dflt-meth-
+path: language/expressions/class/params-meth-
 name: class expression method
 esid: sec-class-definitions-runtime-semantics-evaluation
 es6id: 14.5.16

src/params/default/func-decl.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/function/params-dflt-
+path: language/statements/function/params-
 name: function declaration
 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
 es6id: 14.1.19

src/params/default/func-expr.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/function/params-dflt-
+path: language/expressions/function/params-
 name: function expression
 esid: sec-function-definitions-runtime-semantics-evaluation
 es6id: 14.1.20

src/params/default/gen-func-decl.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/statements/generators/params-dflt-
+path: language/statements/generators/params-
 name: generator function declaration
 esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
 es6id: 14.4.12

src/params/default/gen-func-expr.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/generators/params-dflt-
+path: language/expressions/generators/params-
 name: generator function expression
 esid: sec-generator-function-definitions-runtime-semantics-evaluation
 es6id: 14.4.14

src/params/default/gen-meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/object/method-definition/params-dflt-gen-meth-
+path: language/expressions/object/method-definition/params-gen-meth-
 name: generator method
 esid: sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation
 es6id: 14.4.13

src/params/default/meth.template

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-path: language/expressions/object/method-definition/params-dflt-meth-
+path: language/expressions/object/method-definition/params-meth-
 name: method
 esid: sec-runtime-semantics-definemethod
 es6id: 14.3.8