fix string[Infinity] and string.localeCompare.length

fix string[Infinity] and string.localeCompare.length
Commented test 15.5.4.9_CE

String must be normalized for this unit test to pass. string.Normalize()
is not available for Portable library project
Merge pull request #5 from fredericaltorres/master

Fixed string[Infinity], string.localeCompare.length and skipped one unit tests