CLOUDSTACK-3890. Delting the storage pool is not getting from xenserver. The
storage pool entry was removed from the db but the pool wasn't unmounted from
the host. There was a check that if the pool is not in UP state then the entry
can just be removed. That is wrong. A pool can only be removed if it is in
maintenance state. So after putting the pool in maintenance state if admin
tries to delete the pool we just remove the db entry without un-mounting the
storage pool from the host. Removed the incorrect check.
Cloudstack-3882 remove duplicate entres of dataserver from /etc/hosts

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>
CLOUDSTACK-3215 Logs in the Software router are not being rotated
CLOUDSTACK-3846 usage event is not generated for volume resize
CLOUDSTACK-3877 Unable to Resize Volume (kvm, vmware)