Revert 12.14-1 and 12.14-2 (Fixes #120)

Assume tests run with Annex B semantics enabled. (Fixes #120)

- this change hits all files that use
dataPropertyAttributesAreCorrect or
acccessorPropertyAttributesAreCorrect

Major changes:
- remove include of runTestCase.js,
dataPropertyAttributesAreCorrect.js and
acccessorPropertyAttributesAreCorrect.js
- add include of propertyHelper.js
- remove function testCase() and call to
function runTestCase()
- instead of collecting test state into booleans,
which are eventually returned from runTestCase,
test conditions and throw errors immediately
- use negative: to check error types instead of
using `instanceof` in a catch() block

Selected commit logs follow:

manual conversion of accessorPropertyAttributesAreCorrect() test
 - remove runTestCase
 - remove wrapping testCase function
 - unindent
 - remove includes of runTestCase & accessor...
 - add include of propertyHelper.js
 - unpack final two args 'true, false' to explicit inline
   tests of isEnumerable and isConfigurable
 - unpack setter test into inline logic
 - unpack getter test into inline logic

used script to replace includes: frontmatter
with propertyHelper.js ; manually added back
references to fnGlobalObject() where needed

additional helper functions

add helper functions for get and writable
duplicate runTestCase so can remove runTestCase.js from
includes of all tests in batch

use keyboard macros to simplify repetitive conversions
remove auto-save file accidentaly committed

minor changes, manually remove runTestCase from remaining files
lint etc. fixes

remove now-obsolete harness files

make strict/nonstrict variants

tests where behavior is different in strict/nonstrict
need two variants

- strict mode throws on assign to read-only element (no setter fn)
- strict mode separates named arguments from arguments[]

fix indentation

cleanup minor issues

reviewing 15.2.3.7-9 tests, found some minor issues

- indentation/spacing
- duplicate test (eg, direct test of value and dataProp...)
- remove needless try/finally
- use assert.. helpers in place of if(is..
- rename some assertions to 'e'

rename assertX to verifyX
new helper fn sameValue
test "set" as well as get
reverse order of checks
restore test of desc2
restore test of length
restore test of ownProperty
incorporate suggestions re order of ops, Object.prototype
add test of sameValue helper
restore return value in getter
restore second defineProperty call
restore check of explicit "false"
restore explicit test of TypeError
set noStrict flag on arguments changes
rename catch var to "e"	b4ad0e6
remove dataPropertyAttributesAreCorrect from tests	0d83ff2
remove accessorPropertyAttributesAreCorrect from tests	bb926f3
remove {data,accessor}Property... fns from harness

fix writable check on array.length

call $ERROR if expected exception not thrown
fix Epected => Expected typo

use assert._isSamevalue

split "this" tests into strict/nonstrict branches
split callable into separate test cases

metadata: rename es6 to features

This change adds 'var' declarations for global variables to allow the tests to run in strict mode (see issue #35).
Extra care was taken to ensure the changes do not alter the test behavior, for example when implicit creation of global variables are part of the test.
Note: The change does not fix all strict mode errors due to missing 'var' declarations.

Identifier resolution in dynamic scope context is missing test coverage, resolves https://bugs.ecmascript.org/show_bug.cgi?id=1751 .

add test of object with only "length" getter
*fix typo

per comments from @anba, thanks!
 * remove needless checks
 * add "splice" method

fix es5id

Array.prototype.find no longer skips holes

Clean up ./test directory

The with statement tests were novel, but the tests for
property accessors throwing errors for undefined & null
were duplicates with S11.2.1_A3_T4/5 respectively.

Add assert.throws

Closes #57.

add "assert.js" to python, website runners too

Initial assert helpers

Whitespace fixes

Presumably since Python is whitespace-sensitive, this is actually quite important?

Closes #110

Sbp_A1_T1 to Sbp_A5_T2, Sbp_12, Sbp_7*: Functions are now valid in blocks, tests syntactically invalid anyway
Sbp_A10_T1 to Sbp_A10_T2: Tests are broken

remove obsolete attributes from frontmatter fixes #80

browser runner: check negative regex

remove spec attribute
remove assertion, section, name

add initial set of tests for Promise

See also: https://github.com/tc39/test262/pull/29

test262.py crashes when --logfile due to reference to absent attribute 'logfile'

add test to repro #114
fix issue #114
factor out PercentFormat function
new fn write; start factoring summary output
fix tests to match
consolidate "Failed Tests" message
add test for successful run
consolidate all_succeeded message
consolidate summary line
consolidate ntests
failing negative tests
squeeze whitespace

add more tests of Promise.all

additional Promise test

add tests of Promise.prototype

add some tests for Promise.race

additional Promise tests

add Promise.reject and Promise.resolve tests

correct test description

rename badly-named files

use current license and minor style cleanup

correct understanding of undefined as thisArgument

incorporate line notes

Is this enough to make a constructor in ES6?

more accurate use of resolved,fulfilled etc.
remove some redundant tests
add new tests

remove "constant array" unclear language

better description

Update S25.4.2.1_A3.2_T1.js

address dangling ()

changes per @anba line notes
 - if GetIterator is abrupt, the Promise.race / Promise.all should reject
 - if Promise.race is called with nonconforming constructor as 'this',
   TypeError should be thrown (cannot reject if exeption is thrown from
   NewPromiseCapability; no promise exists yet...)

correct description of "this" testing in callbacks

fix whitespace, formatting

remove tab
add "next-turn" checking to sequencers

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