Update spawner to accept controllers list and start them in sequence (backport #1139)

[mergify]

This is an automatic backport of pull request #1139 done by Mergify.
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Changes to be committed:
	modified:   controller_manager/test/test_spawner_unspawner.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   controller_manager/controller_manager/spawner.py
	both modified:   controller_manager/controller_manager/unspawner.py

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[bmagyar]

Suggested change

	<<<<<<< HEAD
	=======
	parser.add_argument("controller_names", help="Name of the controller", nargs="+")
	>>>>>>> 4e78813 (Update spawner to accept controllers list and start them in sequence (#1139))
	parser.add_argument(
	'controller_name', help='Name of the controller')
	parser.add_argument("controller_names", help="Name of the controller", nargs="+")

[bmagyar]

Suggested change

	<<<<<<< HEAD
	prefixed_controller_name = controller_name
	if controller_namespace:
	prefixed_controller_name = controller_namespace + '/' + controller_name
	node = Node('spawner_' + controller_name)
	if not controller_manager_name.startswith('/'):
	=======
	node = Node("spawner_" + controller_names[0])
	if not controller_manager_name.startswith("/"):
	>>>>>>> 4e78813 (Update spawner to accept controllers list and start them in sequence (#1139))
	node = Node("spawner_" + controller_names[0])
	if not controller_manager_name.startswith("/"):

[saikishor]

There is a missing arg stopped, rest LGTM

[bmagyar]

good catch, thank you!