Fix port hardcoded on APILink sample

Now the sample will reflect what's in the configuration.

Change-Id: Ia72baca546dfa1f052e0a646017810d91fcab97b

cloudkitty/api/root.py

@@ -15,6 +15,7 @@
 #
 # @author: Stéphane Albert
 #
+from oslo_config import cfg
 import pecan
 from pecan import rest
 from wsme import types as wtypes
@@ -22,6 +23,9 @@ import wsmeext.pecan as wsme_pecan
 
 from cloudkitty.api.v1 import controllers as v1_api
 
+CONF = cfg.CONF
+CONF.import_opt('port', 'cloudkitty.api.app', 'api')
+
 
 class APILink(wtypes.Base):
     """API link description.
@@ -43,7 +47,8 @@ class APILink(wtypes.Base):
         sample = cls(
             rel='self',
             type='text/html',
-            href='http://127.0.0.1:8889/{id}'.format(
+            href='http://127.0.0.1:{port}/{id}'.format(
+                port=CONF.api.port,
                 id=version))
         return sample