Merge from oslo-incubator

Merging processutils.py and dependencies from oslo-incubator.
Primarily, I want change d6b55fb but the rest come along for
the ride.

0d7296f Add kwargs to jsonutils.load(s) functions
3310d8d update new requests logger to default WARN
33afb20 Fix broken formatting of processutils.execute log statement
3d90045 Backport code for i18n to check lazy at runtime
433fa0b Make logging_context_format_string optional in log.set_defaults
4d9328c Python 3: enable tests/unit/test_log.py
5fd77eb Ability to customize default_log_levels for each project
6751b30 Remove extra whitespace
726d00a Adjust oslo logging to provide adapter is enabled for
ac92c06 Add default log level for websocket
cb5a804 Move `mask_password` to strutils
d6b55fb Remove `processutils` dependency on `log`
e184dd3 Fix exception message in openstack.common.processutils.execute
ef37e03 Added missing jsonutils.dump() function

Change-Id: I567f514faed5a8467602257d35a98625801daf22
Closes-Bug: #1349890
Merge "Merge from oslo-incubator"