[FIX] Revert too strict JSCS fix for Jade l10n task

We need to use 'jade_l10n_extractor', not 'jadeL10nExtractor'.
Merge pull request #2006 from jublonet/issue/revert-jscs-for-grunt-jade-l10n-extractor

[FIX] Revert too strict JSCS fix for Jade l10n task