xenapi: Add cleanup_sm_locks script

XenServer 5.6 and 6.0 don't appear to be cleaning up sm locks when using
a FileSR. When enough locks accumulate, this causes image related
operations to fail.

This cleanup script is a stop-gap solution that can be run against all
of the dom0's in the cluster to prevent too many locks from
accumulating.

We can remove this script when the root-cause is fixed upstream.

References 1103158

Change-Id: I798bcfeb727a59003910b82d331fdbe031c4a2b4
Remove network manager from compute manager.

Remove an instance of the configured network manager from the compute
manager.  It's not used anywhere.  This was also the only place the
network_manager config option was used, so remove the config import as
well.

Change-Id: I8cfad16e96018e649dd223c3a7132a3860928c23
Merge "xenapi: Add cleanup_sm_locks script"
Merge "Remove network manager from compute manager."
Merge remote-tracking branch 'citrix/master' into build-temp