fix async problems with closure variabls in lowlevelfileio-test. cleanup error reporting in failing async tests.
fix jshint error
rename callback methods to spy
Merge branch 'jasonsanjose/issue-4415' of https://github.com/adobe/brackets into jasonsanjose/issue-4415
Merge branch 'master' into jasonsanjose/issue-4415

Conflicts:
	test/spec/InlineEditorProviders-test.js
Merge pull request #4432 from adobe/jasonsanjose/issue-4415

Fix and add error reporting for async tests failing on build machines