Sync with latest oslo-incubator

Changes include:
55ca7c3 Split cliutils
1b44601 Allow dictionary lookup in credentials with dot notation
6c706c5 Delete graduated serialization files
3edbfb3 remove caching param from prettytable call
9ce1d96 Fix i18n import
5d40e14 Remove code that moved to oslo.i18n
a4be4ed Remove graduated config modules
6ff6b4b Switch oslo-incubator to use oslo.utils and remove old modules
70189c9 Remove graduated test and fixtures libraries
8b71f57 Delete graduated db files
6ede600 rpc, notifier: remove deprecated modules
6b65a41 Fix build break - switch from str to hash for lookup
f76f44c Delete the token and endpoint on expiry of token of client
aebb58f Fix typo to show correct log message
1131b56 Enabled mask_password to handle byte code strings
6b048e7 Let oslotest manage the six.move setting for mox

Change-Id: Ic588aec0fc0291440feaac3439836054bd3608cd
Merge "Sync with latest oslo-incubator"