Change oslo.serialization to oslo_serialization

The oslo libraries are moving away from namespace packages.

bp drop-namespace-packages

Change-Id: I76dc9f733b222144f0274f8854877587c3501d1e

keystoneclient/adapter.py

@@ -10,7 +10,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 
 from keystoneclient import utils
 

keystoneclient/hacking/checks.py

@@ -24,8 +24,8 @@ import re
 
 def check_oslo_namespace_imports(logical_line, blank_before, filename):
     oslo_namespace_imports = re.compile(
-        r"(((from)|(import))\s+oslo\.utils)|"
-        "(from\s+oslo\s+import\s+utils)")
+        r"(((from)|(import))\s+oslo\.((serialization)|(utils)))|"
+        "(from\s+oslo\s+import\s+((serialization)|(utils)))")
 
     if re.match(oslo_namespace_imports, logical_line):
         msg = ("K333: '%s' must be used instead of '%s'.") % (

keystoneclient/session.py

@@ -18,7 +18,7 @@ import os
 import time
 
 from oslo.config import cfg
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import importutils
 import requests
 import six