add kubernetes volumes to glance pod

Use kubernetes volumes for data storage rather than placing data
directly on the container filesystem.  That provides a starting point
for thinking about persistent data -- one could replace the emptyDir
source with an explicit path via hostDir, and then you would have
storage that would persist over a container delete/re-create.

Change-Id: Ifade1cb2ba546e5e0207c3d8c84965dc2195716b
log to stdout/stderr

modify glance and keystone images to log to stdout/stderr, so that logs
can be recovered using "docker logs".

Change-Id: I18470c13142ceaf2f10c32e10f5e835ddaf58550