Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  f855a656f351731ff83b7a3676c3fdef16566287

Cache requested workflows in UrlGenerator

UrlGenerator often is requested to create multiple
urls for the same workflow.  Cache the loaded workflows
instead of requesting them each and every time.

Change-Id: Id2f8dfce05fa7798934832ba94cb75edc151a2dc