oscwrap: make a little quieter

A huge part of the logs is irrelevant bash aliases captured by the
openstack client timing wrapper from the run of "openstack complete",
which is only helpful on interactive systems where you'll interact
with the command line.  Call it directly to avoid capturing the logs.

While we're here, turn off tracing inside the oscwrap function, which
is called frequently.  It's not useful for debugging.

Change-Id: I1cb5399fe7ee6f0e547a9cfff70396aa2007632e
2 files changed