Renames for consistent namespaces

Castellan was using both key_mgr and keymgr for module names, leading to
inconsistent namespaces such as:

castellan.keymgr.key_mgr.KeyManager

This CR renames both instances to key_manager to be consistent with the
program name.

Change-Id: Ie07a70c14939b6c797e812c441d29218c2940ade

castellan/key_manager/__init__.py

@@ -17,15 +17,15 @@ from oslo_config import cfg
 from oslo_utils import importutils
 
 
-keymgr_opts = [
+key_manager_opts = [
     cfg.StrOpt('api_class',
                help='The full class name of the key manager API class'),
 ]
 
 CONF = cfg.CONF
-CONF.register_opts(keymgr_opts, group='keymgr')
+CONF.register_opts(key_manager_opts, group='key_manager')
 
 
 def API():
-    cls = importutils.import_class(CONF.keymgr.api_class)
+    cls = importutils.import_class(CONF.key_manager.api_class)
     return cls()

castellan/key_manager/not_implemented_key_manager.py

@@ -17,10 +17,10 @@
 Key manager implementation that raises NotImplementedError
 """
 
-from castellan.keymgr import key_mgr
+from castellan.key_manager import key_manager
 
 
-class NotImplementedKeyManager(key_mgr.KeyManager):
+class NotImplementedKeyManager(key_manager.KeyManager):
     """Key Manager Interface that raises NotImplementedError for all operations
 
     """

castellan/key_manager/symmetric_key.py

@@ -19,7 +19,7 @@ Base SymmetricKey Class
 This module defines the SymmetricKey class.
 """
 
-from castellan.keymgr import key
+from castellan.key_manager import key
 
 
 class SymmetricKey(key.Key):

castellan/tests/key_manager/fake.py

@@ -17,8 +17,8 @@
 """Implementation of a fake key manager."""
 
 
-from castellan.tests.keymgr import mock_key_mgr
+from castellan.tests.key_manager import mock_key_manager
 
 
 def fake_api():
-    return mock_key_mgr.MockKeyManager()
+    return mock_key_manager.MockKeyManager()

castellan/tests/key_manager/mock_key_manager.py

@@ -32,11 +32,11 @@ import random
 import uuid
 
 from castellan.common import exception
-from castellan.keymgr import key_mgr
-from castellan.keymgr import symmetric_key as sym_key
+from castellan.key_manager import key_manager
+from castellan.key_manager import symmetric_key as sym_key
 
 
-class MockKeyManager(key_mgr.KeyManager):
+class MockKeyManager(key_manager.KeyManager):
 
     """Mocking manager for integration tests.
 

castellan/tests/key_manager/test_key.py

@@ -20,7 +20,7 @@ Test cases for the key classes.
 import array
 import binascii
 
-from castellan.keymgr import symmetric_key as sym_key
+from castellan.key_manager import symmetric_key as sym_key
 from castellan.tests import base
 
 

castellan/tests/key_manager/test_mock_key_manager.py

@@ -22,9 +22,9 @@ import binascii
 
 from castellan.common import exception
 from castellan import context
-from castellan.keymgr import symmetric_key as sym_key
-from castellan.tests.keymgr import mock_key_mgr
-from castellan.tests.keymgr import test_key_mgr
+from castellan.key_manager import symmetric_key as sym_key
+from castellan.tests.key_manager import mock_key_manager as mock_key_mgr
+from castellan.tests.key_manager import test_key_manager as test_key_mgr
 
 
 class MockKeyManagerTestCase(test_key_mgr.KeyManagerTestCase):

castellan/tests/key_manager/test_not_implemented_key_manager.py

@@ -17,14 +17,14 @@
 Test cases for the not implemented key manager.
 """
 
-from castellan.keymgr import not_implemented_key_mgr
-from castellan.tests.keymgr import test_key_mgr
+from castellan.key_manager import not_implemented_key_manager
+from castellan.tests.key_manager import test_key_manager
 
 
-class NotImplementedKeyManagerTestCase(test_key_mgr.KeyManagerTestCase):
+class NotImplementedKeyManagerTestCase(test_key_manager.KeyManagerTestCase):
 
     def _create_key_manager(self):
-        return not_implemented_key_mgr.NotImplementedKeyManager()
+        return not_implemented_key_manager.NotImplementedKeyManager()
 
     def test_create_key(self):
         self.assertRaises(NotImplementedError,