Add image item quota tests

*Added image_item_quotas test
-Added add_image_member_quote_limit test
-Added add_image_tag_quota_limit test
-Added update_image_property_quota_limit test
-Added method for redundant conditional routine
-Added parameter descriptions for helper methods
-Fixed copyright date

Change-Id: I8c87c4b38473f422f87517d6b1dca517a4be6999
Merge "Add image item quota tests"