Automate flavors, networks, and image get

Functional tests rely on some sort of configuration and
rather than configure something right now, how about it
pulls something from the middle of the available list.

Change-Id: I8147e40e5ee7393d8a8dcf1b0beb48856f28af7e

functional/tests/compute/v2/test_server.py

@@ -15,6 +15,7 @@ import uuid
 
 import testtools
 
+from functional.common import exceptions
 from functional.common import test
 
 
@@ -27,19 +28,38 @@ class ServerTests(test.TestCase):
     FIELDS = ['name']
     IP_POOL = 'public'
 
+    @classmethod
+    def get_flavor(cls):
+        raw_output = cls.openstack('flavor list -f value -c ID')
+        ray = raw_output.split('\n')
+        idx = len(ray)/2
+        return ray[idx]
+
+    @classmethod
+    def get_image(cls):
+        raw_output = cls.openstack('image list -f value -c ID')
+        ray = raw_output.split('\n')
+        idx = len(ray)/2
+        return ray[idx]
+
+    @classmethod
+    def get_network(cls):
+        try:
+            raw_output = cls.openstack('network list -f value -c ID')
+        except exceptions.CommandFailed:
+            return ''
+        ray = raw_output.split('\n')
+        idx = len(ray)/2
+        return ' --nic net-id=' + ray[idx]
+
     @classmethod
     def setUpClass(cls):
         opts = cls.get_show_opts(cls.FIELDS)
-        # TODO(thowe): pull these values from clouds.yaml
-        flavor = '4'
-        image = 'cirros-0.3.4-x86_64-uec'
-        netid = ''
-        if netid:
-            nicargs = ' --nic net-id=' + netid
-        else:
-            nicargs = ''
+        flavor = cls.get_flavor()
+        image = cls.get_image()
+        network = cls.get_network()
         raw_output = cls.openstack('server create --flavor ' + flavor +
-                                   ' --image ' + image + nicargs + ' ' +
+                                   ' --image ' + image + network + ' ' +
                                    cls.NAME + opts)
         expected = cls.NAME + '\n'
         cls.assertOutput(expected, raw_output)