Switch to using oslo_* instead of oslo.*

The oslo team is recommending everyone to switch to the
non-namespaced versions of libraries. Updating the hacking
rule to include a check to prevent oslo.* import from
creeping back in.

This commit includes:
- using oslo_utils instead of oslo.utils
- using oslo_serialization instead of oslo.serialization
- using oslo_db instead of oslo.db
- using oslo_i18n instead of oslo.i18n
- using oslo_middleware instead of oslo.middleware
- using oslo_config instead of oslo.config
- using oslo_messaging instead of "from oslo import messaging"
- using oslo_vmware instead of oslo.vmware

Change-Id: I3e2eb147b321ce3e928817b62abcb7d023c5f13f

tools/config/analyze_opts.py

@@ -27,7 +27,7 @@ import os
 import sys
 
 sys.path.append(os.getcwd())
-from oslo.config import iniparser
+from oslo_config import iniparser
 
 
 class PropertyCollecter(iniparser.BaseParser):

tools/config/oslo.config.generator.rc

@@ -1,2 +1,2 @@
-NOVA_CONFIG_GENERATOR_EXTRA_LIBRARIES="oslo.messaging oslo.db oslo.concurrency"
+NOVA_CONFIG_GENERATOR_EXTRA_LIBRARIES="oslo.messaging oslo_db oslo.concurrency"
 NOVA_CONFIG_GENERATOR_EXTRA_MODULES=keystonemiddleware.auth_token

tools/xenserver/destroy_cached_images.py

@@ -16,7 +16,7 @@ eventlet.monkey_patch()
 import os
 import sys
 
-from oslo.config import cfg
+from oslo_config import cfg
 
 # If ../nova/__init__.py exists, add ../ to Python search path, so that
 # it will override what happens to be installed in /usr/(local/)lib/python...

tools/xenserver/populate_other_config.py

@@ -42,7 +42,7 @@ from nova.openstack.common import uuidutils
 from nova.virt import virtapi
 from nova.virt.xenapi import driver as xenapi_driver
 from nova.virt.xenapi import vm_utils
-from oslo.config import cfg
+from oslo_config import cfg
 
 cli_opts = [
     cfg.BoolOpt('dry-run',

tools/xenserver/vm_vdi_cleaner.py

@@ -20,7 +20,7 @@ import doctest
 import os
 import sys
 
-from oslo.config import cfg
+from oslo_config import cfg
 import XenAPI
 
 possible_topdir = os.getcwd()
@@ -31,7 +31,7 @@ from nova import config
 from nova import context
 from nova import db
 from nova import exception
-from oslo.utils import timeutils
+from oslo_utils import timeutils
 from nova.virt import virtapi
 from nova.virt.xenapi import driver as xenapi_driver