VE-1677 Adding test to add and remove items from gallery's cart
Merge remote-tracking branch 'origin/VE-1675' into VE-1677
VE-1677 Fixes from CR comments
Merge remote-tracking branch 'origin/VE-gallery' into VE-1677

Conflicts:
	src/test/java/com/wikia/webdriver/PageObjectsFactory/ComponentObject/VisualEditorDialogs/VisualEditorInsertGalleryDialog.java
	src/test/java/com/wikia/webdriver/TestCases/VisualEditor/VEGalleryTests.java
Merge pull request #392 from Wikia/VE-1677

VE-1677: Adding test to add and remove items from gallery's cart system