Add extra list server by status test

Add list server by shutoff status test
Add list server by error status test

Change-Id: Ica063797a954a71c0e4c206be08c3c5cf4c60163
Remove copyright from empty files

According to policy change in HACKING:
http://docs.openstack.org/developer/hacking/#openstack-licensing
empty files should no longer contain copyright notices.

Change-Id: I91ef63a07519723b0b499e21f4b11aea6bfee8d1
Closes-Bug: #1262424
Merge "Remove copyright from empty files"
Merge "Add extra list server by status test"