gitlab update to 8.3.6-bb.2

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/gitlab/-/blob/8.3.6-bb.2/CHANGELOG.md

Package MR

big-bang/product/packages/gitlab!340 (merged)

For Issue

Closes big-bang/product/packages/gitlab#294

Upgrade Notices

N/A