Retrospective: Create Big Bang Merge Request Template for Package Owners

GitLab Merge Request Template

Why

When Package owners create merge requests into the Big Bang Package, details are frequently omitted.

Proposed Solution

See: https://confluence.il2.dso.mil/pages/viewpage.action?pageId=50699380

bad MRs (bump a tag), do not know what changes are coming with MR. Big Bang MR should describe what packages changes are made.
	Good MR could link to package MR.
	MORE INFORMATION GOOD
	 Investigate BB MR Template that guides Package owners.