Remove @author tags from copyright statements

We have git to track the authorship of files. It is not necessary to use
the @author tags in the copyright statements.

Change-Id: I67163ffe46540423ca1f5584881d7c2db47fe276
diff --git a/tempest/cmd/cleanup.py b/tempest/cmd/cleanup.py
index 9ae3dfb..a305e42 100644
--- a/tempest/cmd/cleanup.py
+++ b/tempest/cmd/cleanup.py
@@ -12,7 +12,6 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-# @author: David Paterson
 
 """
 Utility for cleaning up environment after Tempest run
diff --git a/tempest/cmd/cleanup_service.py b/tempest/cmd/cleanup_service.py
index f5f0db3..0d3c6c6 100644
--- a/tempest/cmd/cleanup_service.py
+++ b/tempest/cmd/cleanup_service.py
@@ -13,11 +13,7 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-'''
-Created on Sep 3, 2014
 
-@author: David_Paterson
-'''
 from tempest import config
 from tempest.openstack.common import log as logging
 from tempest import test