[NRRPLT-5052] Add mpi4py and netifaces to requirements. Remove a pylint issue.

Change-Id: Ib61b9b12602c1e614112df65212057a18c4c3ecf

hbp_nrp_music_interface/hbp_nrp_music_interface/launch/MUSICMPILauncher.py

@@ -152,6 +152,7 @@ class MUSICMPILauncher(object):
             return
 
         # request the ip of the Gazebo node, result will be -1 if not found
+        # pylint:disable=unpacking-non-sequence
         res, _, ip = rosnode.get_api_uri(rospy.get_master(), '/gazebo', True)
         if res == -1:
             return

hbp_nrp_music_interface/requirements.txt

 # third party requirements
+mpi4py==2.0.0
+netifaces==0.8