Prepare 9.3 RC5

Summary

This MR prepares 9-3-stable branch to tag %9.3 RC5 via 9-3-stable-rc5 branch.

MRs to Pick for RC5

Use following filter to find eligible MRs;

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests?scope=all&utf8=%E2%9C%93&state=merged&label_name[]=Pick%20into%20Stable&milestone_title=9.3

Steps

• Cherry-pick MR into 9-3-stable-rc5 and push it to GitLab.com

• If there were conflicts, create a separate branch off of 9-3-stable-rc5 and create MR, notify authors to resolve conflicts and once MR is green, merge it.

• Once this MR is ready for RC5, merge it.