Add sightly use-api vars (use,currentPage) to lint
Add sightly use-api vars (use,currentPage) to lint

Currently sightly files are breaking the jslint tests under enableCodeQuality.  Added a couple of predefined vars to the lint tests to prevent failures.  Not sure what the entire list of predefined vars for sightly are though, perhaps [defineObjects](https://docs.adobe.com/docs/en/cq/5-6/howto/taglib.html#<cq:defineObjects>)
mtstv/lazybones-aem-templates,gutsy/lazybones-aem-templates