remove unused integration/test/src/main/features/features.xml
remove unused integration/test/src/main/features/features.xml

It's not used.

Change-Id: I11367516306cc4f739a3ddffa43053ffdb0f7d5b
Signed-off-by: Isaku Yamahata <87b7f730b993ec3947ada6404f19ac98e56bb574@intel.com>

opendaylight/neutron