Adds config params for admin auth

* Allows for admin auth to be configured seperately
  from normal user auth

Change-Id: I27fbd9c4d5b0a1498c5af87fab6b3a9cbeb51782

cloudcafe/compute/config.py

@@ -51,6 +51,18 @@ class ComputeAdminConfig(ConfigSectionInterface):
 
     SECTION_NAME = 'compute_admin_user'
 
+    @property
+    def authentication_endpoint(self):
+        return self.get("authentication_endpoint")
+
+    @property
+    def compute_endpoint_name(self):
+        return self.get("compute_endpoint_name")
+
+    @property
+    def region(self):
+        return self.get("region")
+
     @property
     def username(self):
         return self.get("username")