Fix default socket name for Agent when configuration is blank.
Fix default socket name for Agent when configuration is blank.

Change-Id: Ia3676a97f677223147f7e2ae600495e7ae77b656
Signed-off-by: Rob Adams <dc34e1981fc17062c98433ad1bfcab20a4e3a66c@readams.net>

opendaylight/opflex,opendaylight/opflex,opendaylight/opflex,opendaylight/opflex