Sync latest versionutils from oslo-incubator

Sync latest versionutils to let us add warning for deprecated class in
Kilo. This also syncs its dependency module log and _i18n.

versionutils:
5d40e14 Remove code that moved to oslo.i18n
1c3ecfc Enhance versionutils.deprecated to work with classes
9a46271 Add Kilo release name to versionutils
a2ad3a2 Allow deprecated decorator to specify no plan for removal
05ae498 Add JUNO as a target to versionutils module
de4adbc pep8: fixed multiple violations

log:
ac4330d Make use_syslog=True log to syslog via /dev/log
df774ff Import PublishErrorsHandler from oslo.messaging
a3220c5 add list_opts to all modules with configuration options
6c706c5 Delete graduated serialization files
5d40e14 Remove code that moved to oslo.i18n
6ff6b4b Switch oslo-incubator to use oslo.utils and remove old modules
aa74411 log: add missing space in error message

Change-Id: I9c1911e666e603d306685ff8bea390830c656256
Don't use module excutils from oslo-incubator

Remove module excutils and sync its only consumer module fileutils,
which is using oslo.utils.

Change-Id: Ib2c60be9febf5e15b198529b11c978d2e5b6df1f
Sync policy from oslo-incubator

Sync latest policy module at ddd63a7346bb57a47b0cd031608fc9475d68e241 to
help remove it's dependency for jsonutils. It also fixes some
bugs and introduces new option "policy_dirs", allow developer to add
some policy files in multiple directories.

Change-Id: Ibdb5832712d843ccce29c945cfbe4570dc5799aa
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I58ba936ec94195965e5c038612a57b290ba82cfe
Updated from global requirements

Change-Id: I58714f27507e2ec1117e23577ab082341b7a032b
Merge "Imported Translations from Transifex"
Merge "Sync latest versionutils from oslo-incubator"
Merge "Don't use module excutils from oslo-incubator"
Merge "Sync policy from oslo-incubator"