In order to start making the transition in the gate make
USE_SCREEN=False also mean USE_SYSTEMD=True. We'll never actually
declare USE_SYSTEMD=True in the gate (as that doesn't exist for stable
branches), but this will let us roll over the existing transition.
We also have to install systemd-python 234 because we are recording
exception info in the journal, and all versions before that had a bug
in processing that.
Remove the somewhat pointless screen following journalctl commands. We
really don't want or need those, and they tend to build up over time.
Depends-On: I24513f5cbac2c34cf0130bf812ff2df6ad76657c
Change-Id: I6af6d1857effaf662a9d72bd394864934eacbe70
c006bbdeb2