host-deploy: utilize engine correlation id

1. Apply correlation id to events.

2. Add correlation id to deploy log file name.

3. Add correlation id eye catcher to otopi environment, it is ignored by
   otopi and ovirt-host-deploy, but usable for debugging.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=902949
Change-Id: I5dba5b6d1319f0b4caa6f0d3e77683a098df31e5
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>