Implement end-cycle

- Conditionally show the end cycle button (only when there is a current
cycle)
- Set the status of the current cycle to Finished on click of
button.end-cycle.
Merge pull request #1542 from reciprocity/feature/end-cycle

Implement end-cycle
Move Request Assignee to 2nd tier
Add find_all function to cacheable. (It still needs some work)
Move response assignee to 2nd tier
Merge pull request #1545 from reciprocity/feature/audit-assignee-2nd-tier

Move Request Assignee to 2nd tier
Merge remote-tracking branch 'origin/develop' into feature/workflow-task-my-work

Conflicts:
	src/ggrc/assets/javascripts/models/cacheable.js