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Updated grunt-contrib-jshint to latest version to get latest version of jshint(supports mocha environment and multiple .jshintrc and config extension).
Updated jshint configs to prevent errors for unit test source files and be more strict about when unit test syntax and globals are allowed.
Updated unit test files to set required answers as a local variable to remove dependency on using "predef" property in .jshintrc and manually mantaining list.