Replace runTestCase with assert.throws [test/language/]

test/language/arguments-object/10.5-1-s.js

test/language/arguments-object/10.5-7-b-1-s.js

test/language/arguments-object/10.6-13-b-1-s.js

test/language/arguments-object/10.6-13-c-1-s.js

test/language/arguments-object/10.6-14-b-4-s.js

test/language/arguments-object/10.6-14-c-4-s.js

test/language/directive-prologue/10.1.1-25-s.js

test/language/directive-prologue/10.1.1-30-s.js

test/language/future-reserved-words/7.6.1-17-s.js

test/language/future-reserved-words/7.6.1-18-s.js

test/language/future-reserved-words/7.6.1-19-s.js

test/language/future-reserved-words/7.6.1-20-s.js

test/language/future-reserved-words/7.6.1-21-s.js

test/language/future-reserved-words/7.6.1-22-s.js

test/language/future-reserved-words/7.6.1-23-s.js

test/language/future-reserved-words/7.6.1-24-s.js

test/language/future-reserved-words/7.6.1-25-s.js

test/language/future-reserved-words/7.6.1.2-1-s.js

test/language/future-reserved-words/7.6.1.2-2-s.js

test/language/future-reserved-words/7.6.1.2-3-s.js