Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  a499327252d8397ca35b2e7fe45180ae76d20c5d

Added cucumber tests for entity descriptions

- small adjustments to label tests were necessary due to better code reuse
- added additional tests for empty labels and descriptions

Change-Id: I589d13445bb4cedb475ff481eb78fb1276b56963