DO THE THINGS! TEST THE STUFF!

This is a modified matrix that tests the changes in the following PRs:

- ManageIQ/manageiq#19547
- ManageIQ/manageiq-gems-pending#454

but replaces ManageIQ/manageiq#19547 with the following branch:

https://github.com/NickLaMuro/manageiq/tree/rebase_testing

Which does a few extra steps to attempt to graft commits prior to
rebasing.

Unsure of the `git` results, but before open a separate PR, this should
test to see if specs still pass.

.travis.yml

@@ -14,6 +14,6 @@ matrix:
   fast_finish: true
 env:
   global:
-  - REPOS=
+  - REPOS=manageiq-gems-pending#454
   matrix:
-  - TEST_REPO=manageiq
+  - TEST_REPO=NickLaMuro/manageiq@rebase_testing