Fixed search pattern in Ironic detection plugin

The original pattern .*200 OK.* does not match the output from the specified
ironic-api url, and exanple of which is shown below. The .*v1.* seems like
a better choice, and is consistent with other plugins.

{"default_version": {"id": "v1", "links": [{"href":
"http://localhost:6385/v1/","rel": "self"}]}, "versions": [{"id": "v1",
"links": [{"href": "http://localhost:6385/v1/", "rel": "self"}]}],
"name": "OpenStack Ironic API", "description":
"Ironic is an OpenStack project which aims to provision baremetal machines."}

Change-Id: I2b44253705d7f8240b2962070893588152ef3257

monasca_setup/detection/plugins/ironic.py

@@ -17,7 +17,7 @@ class Ironic(monasca_setup.detection.ServicePlugin):
             'service_name': 'baremetal',
             'process_names': ['ironic-api', 'ironic-conductor'],
             'service_api_url': "http://localhost:6385",
-            'search_pattern': '.*200 OK.*',
+            'search_pattern': '.*v1.*',
         }
 
         super(Ironic, self).__init__(service_params)