apply_patch() in both of these SCMClients failed to pass

ignore_errors=True. This meant that that patch error handling would

never kick in, instead causing a more general error running the process.

This wasn't caught since unit tests (currently) spy on execute() and

override behavior, so error handling logic never kicks in.
This change adds the missing ignore_errors=True to these.

Unit tests pass.
Also tested unit tests with the upcoming moves to run_process().