Fix support for network-spaces

Drop provision of hostname parameter for mysql-shared/shared-db
relations; newer interface versions automatically set the
hostname parameter based on Juju 2.0 network space bindings or
the units private-address in older Juju versions.

Change-Id: I55ff32c26478399fd8486ce0a618ad1a80b6476b

src/reactive/designate_handlers.py

@@ -14,7 +14,6 @@
 
 
 import charm.openstack.designate as designate
-import charmhelpers.core.hookenv as hookenv
 import charms.reactive as reactive
 
 COMPLETE_INTERFACE_STATES = [
@@ -44,9 +43,9 @@ def setup_amqp_req(amqp):
 def setup_database(database):
     """Send request designate accounts and dbs"""
     database.configure('designate', 'designate',
-                       hookenv.unit_private_ip(), prefix='designate')
+                       prefix='designate')
     database.configure('dpm', 'dpm',
-                       hookenv.unit_private_ip(), prefix='dpm')
+                       prefix='dpm')
     designate.assess_status()
 
 

unit_tests/test_designate_handlers.py

@@ -151,18 +151,15 @@ class TestDesignateHandlers(unittest.TestCase):
     def test_database(self):
         self.patch(handlers.designate, 'assess_status')
         database = mock.MagicMock()
-        self.patch(handlers.hookenv, 'unit_private_ip', 'private_ip')
         handlers.setup_database(database)
         calls = [
             mock.call(
                 'designate',
                 'designate',
-                'private_ip',
                 prefix='designate'),
             mock.call(
                 'dpm',
                 'dpm',
-                'private_ip',
                 prefix='dpm'),
         ]
         database.configure.has_calls(calls)