Fix Error 500 when relative submodule resolves to a namespace that has a different name from its path

What does this MR do?

This MR fixes a bug in resolving a namespace when the name differed from path.

Why was this MR needed?

The original code was using name, when the proper input to namespace_project_path was path.

What are the relevant issue numbers?

Closes #1849 (closed)

/cc: @razer6

I confirm this is working

Added 39 commits:

• 82281861...88343897 - 38 commits from branch gitlab-org:master
• 774b7ee2 - Fix Error 500 when relative submodule resolves to a namespace that has a differe…

Reassigned to @dzaporozhets

Status changed to merged

mentioned in commit 88162f69