It appears Trove still depends on MySQL-python.
Restore the workaround for broken Percona repo.
Closes-Bug: #1531371
Related-Bug: #1526129
Change-Id: I1781fee14e17a6b7cbb2cf8dae639e049698b9e6
There were some inconsistencies with pip install instructions
thoughout Kolla. We fix those here.
Additionally, we fix the virtualenv to properly use the site-packages
on the host if a library is not available in the venv.
Change-Id: Ib84d48e8826bb96060338b3fa0782620c98794a8
Related-Bug: #1524684
Closes-Bug: #1529434