engine: fix vmJob logging

Make logging more clear and less spammy for vmJobs updates made in
VdsUpdateRunTimeInfo.

Change-Id: I0f5a9851c347366413496fb6e6375e7d44d1a30b
Bug-Url: https://bugzilla.redhat.com/1110394
Signed-off-by: Greg Padgett <gpadgett@redhat.com>