return style/classes property concatenation to preserving the instance style and classes properties from their kindStyle/kindClasses properties

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@lge.com>
because styles are no longer automatically thrown into the styleKind property (preserved unless sub-kinded) these tests no longer make sense, also, style additions are appended and do not replace the actual style property so it will not be explicitly set to the value in the overrides

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@lge.com>
Merge pull request #462 from enyojs/ENYO-3122-cole-davis

Fix for ENYO-3122

Reviewed-By: Ben Combee (ben.combee@lge.com)