Capture logs for lib/neutron services

Services supported by the new lib/neutron devstack library use neutron-
prefix not q-. Support both for the time being. Eventually we will get
rid of q- prefix.

The patch also adds neutron-l3 sample file to test suite, to make sure
we don't regress in the future.

Change-Id: I48ca66421d39a8fdd8700adf691823e20a03ab30

os_loganalyze/filter.py

@@ -23,7 +23,8 @@ import os_loganalyze.util as util
 # which logs support severity
 SUPPORTS_SEV = re.compile(
     r'/'  # this uses an re.search so anchor the string
-    r'((screen-)?(n-|c-|q-|g-|h-|ir-|ironic-|m-|'
+    r'((screen-)?(n-|c-|g-|h-|ir-|ironic-|m-|'
+    r'q-|neutron-|'  # support both lib/neutron and lib/neutron-legacy logs
     r'ceil|key|sah|des|tr)'  # openstack logs
     # other things we understand
     r'|(keystone|placement-api|tempest)\.txt|syslog)')

os_loganalyze/tests/test_wsgi.py

@@ -159,6 +159,14 @@ class TestWsgiDisk(base.TestCase):
             'WARNING': 48,
             'ERROR': 72,
             },
+        'screen-neutron-l3.txt.gz': {
+            'DEBUG': 25212,
+            'INFO': 85,
+            'AUDIT': 0,
+            'TRACE': 0,
+            'WARNING': 122,
+            'ERROR': 19,
+            },
         }
 
     @mock.patch.object(swiftclient.client.Connection, 'get_object',