As discussed in the Liberty Design Summit "Moving apps to Python 3"
cross-project workshop, the way forward in the near future is to
switch to the pure-python PyMySQL library as a default.
https://etherpad.openstack.org/p/liberty-cross-project-python3
BaseMySqlRootAccess.enable_root(): catch also InternalError because
the PyMySQL error is not wrapped into a SQLAlchemy OperationalError,
but a generic SQLAlchemy InternalError. Similar change is made in
026_datastore_versions_unique_fix.py.
This change requires a trove integration change to add the PyMySQL to
the guest image: Id4d013d174ba40a453819f900aaa316a93e59b48.
Partially implements: blueprint trove-python3
Co-Authored-By: Victor Stinner <vstinner@redhat.com>
Depends-On: Id4d013d174ba40a453819f900aaa316a93e59b48
Change-Id: I65e8a8d5dc251a8b00529cdfb1a6ada3d5720f68
42de1e7f7e