Fix for BUG 5137 in Neutron changes the type of extraroutes from string to
destination and nexthop. This fix is to change vpnservice code as per
neutron change.
Neutron change: https://git.opendaylight.org/gerrit/33846
Change-Id: I702f81adc3579943bef9e71e616dde4280692847
Signed-off-by: Vishal Thapar <vishal.thapar@ericsson.com>
(cherry picked from commit
535c182e3b03fa32aaccc4349fecb835a1468a82)