Bug 5123: Fixed stand-alone flowcondition delete issue.
Bug 5123: Fixed stand-alone flowcondition delete issue.

* Fixed the stand-alone flowcondition delete issue
  in ODCdriver module which was present in VTNManager
  even after the flowfilter was deleted.


Change-Id: I6804810e8758c1101b9590b79ec357f66cbe2634
Signed-off-by: yogalakshmi.pa <f558ba46e37ae5dc29a6fbd6f8053e8fb22f0537@hcl.com>
(cherry picked from commit 42e54bbd235fba75363014f244450f2c03297ab2)

opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn,opendaylight/vtn