message: fly_mission.py: shorten dronecore_pb2 to dc
diff: @@ -5,7 +5,7 @@ from __future__ import print_function
  import grpc
  from threading import Thread
  import time
  -import dronecore_pb2
  +import dronecore_pb2 as dc
  import dronecore_pb2_grpc
  @@ -23,7 +23,7 @@ def run():
  global thread_status
  channel = grpc.insecure_channel('0.0.0.0:50051')
  stub = dronecore_pb2_grpc.DroneCoreRPCStub(channel)
  - stub.AddWaypoint(dronecore_pb2.Waypoint(latitude=47.398170327054473,
  + stub.AddWaypoint(dc.Waypoint(latitude=47.398170327054473,
  longitude=8.5456490218639658,
  altitude=10,
  speed=2,
  @@ -31,7 +31,7 @@ def run():
  pitch=0,
  yaw=-60,
  camera_action=5))
  - stub.AddWaypoint(dronecore_pb2.Waypoint(latitude=47.398241338125118,
  + stub.AddWaypoint(dc.Waypoint(latitude=47.398241338125118,
  longitude=8.5455360114574432,
  altitude=10,
  speed=2,
  @@ -40,7 +40,7 @@ def run():
  yaw=-60,
  camera_action=0))
  time.sleep(2)
  - future_status = stub.FlyMission.future(dronecore_pb2.Empty())
  + future_status = stub.FlyMission.future(dc.Empty())
  t = Thread(target=wait_func, args=(future_status,))
  t.start()
  while(thread_status):
  