Fix a spelling typo in error message

occured -> occurred
for arista_l3_driver.py

Also fixed following spelling typo in comments:
authentification -> authentication
genric -> generic
vaild -> valid
infromation -> information

Change-Id: Ic4b7c5a990a8de7576334a9715dd78ddba63a539
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>

networking_arista/l3Plugin/arista_l3_driver.py

@@ -380,7 +380,7 @@ class AristaL3Driver(object):
             LOG.info(_LI('Results of execution on Arista EOS: %s'), ret)
 
         except Exception:
-            msg = (_('Error occured while trying to execute '
+            msg = (_('Error occurred while trying to execute '
                      'commands %(cmd)s on EOS %(host)s') %
                    {'cmd': full_command, 'host': server})
             LOG.exception(msg)

networking_arista/ml2/arista_ml2.py

@@ -60,7 +60,7 @@ class AristaRPCWrapper(object):
         self.cli_commands['timestamp'] = []
 
     def check_cli_commands(self):
-        """Checks whether the CLI commands are vaild.
+        """Checks whether the CLI commands are valid.
 
            This method tries to execute the commands on EOS and if it succeedes
            the command is stored.
@@ -95,7 +95,7 @@ class AristaRPCWrapper(object):
 
     def plug_port_into_network(self, vm_id, host_id, port_id,
                                net_id, tenant_id, port_name, device_owner):
-        """Genric routine plug a port of a VM instace into network.
+        """Generic routine plug a port of a VM instace into network.
 
         :param vm_id: globally unique identifier for VM instance
         :param host: ID of the host where the VM is placed

networking_arista/ml2/mechanism_arista.py

@@ -159,7 +159,7 @@ class AristaDriver(driver_api.MechanismDriver):
                                  ' in Arista DB'), network_id)
 
     def delete_network_precommit(self, context):
-        """Delete the network infromation from the DB."""
+        """Delete the network information from the DB."""
         network = context.current
         network_id = network['id']
         tenant_id = network['tenant_id']
@@ -192,7 +192,7 @@ class AristaDriver(driver_api.MechanismDriver):
                 raise ml2_exc.MechanismDriverError()
 
     def create_port_precommit(self, context):
-        """Remember the infromation about a VM and its ports
+        """Remember the information about a VM and its ports
 
         A VM information, along with the physical host information
         is saved.

networking_arista/tests/unit/ml2/test_arista_mechanism_driver.py

@@ -1003,7 +1003,7 @@ class SyncServiceTest(testlib_api.SqlTestCase):
 
 
 class fake_keystone_info_class(object):
-    """To generate fake Keystone Authentification token information
+    """To generate fake Keystone Authentication token information
 
     Arista Driver expects Keystone auth info. This fake information
     is for testing only

networking_arista/tests/unit/ml2/test_mechanism_arista.py

@@ -349,7 +349,7 @@ class AristaDriverTestCase(testlib_api.SqlTestCase):
 
 
 class fake_keystone_info_class(object):
-    """To generate fake Keystone Authentification token information
+    """To generate fake Keystone Authentication token information
 
     Arista Driver expects Keystone auth info. This fake information
     is for testing only