Fixed a parameter issue for config drive files

The parameters passed to novaclient create for config drive
files and user data were incorrect.

Change-Id: Ic7e2a1a32600194959d0c02179bbb0986bfe1413

octavia/compute/drivers/nova_driver.py

@@ -73,8 +73,8 @@ class VirtualMachineManager(compute_base.ComputeBase):
                 name=name, image=image_id, flavor=amphora_flavor,
                 key_name=key_name, security_groups=sec_groups,
                 nics=nics,
-                config_drive_files=config_drive_files,
-                user_data=user_data,
+                files=config_drive_files,
+                userdata=user_data,
                 config_drive=True
             )
 

octavia/tests/unit/compute/drivers/test_nova_driver.py

@@ -78,8 +78,8 @@ class TestNovaClient(base.TestCase):
             flavor=1,
             key_name=1,
             security_groups=1,
-            config_drive_files='Files Blah',
-            user_data='Blah',
+            files='Files Blah',
+            userdata='Blah',
             config_drive=True)
 
     def test_bad_build(self):