Sync oslo modules

Synchronize oslo modules, removing unsed gettextutils and fixing tests
for policy module change.

Change-Id: I2fbb3668522eabea9a6408ccd2f3c3d76645e2ee
Add cinder volume constraint for Cinder Volume

Add cinder volume constraint for Cinder Volume resource.

Notes: missed for 'source_volid' property in
bp/cinder-custom-constraints

Change-Id: I5698206bce16ef09a80fc44c36cb49b155b31365
Add cinder volume type constraint for resources

Add cinder volume type constraint for resources.

Change-Id: I2860418b8d4ee8ec076c35836d48a2c60aea7274
Notes: missed in bp/cinder-custom-constraints
Support cinder volume retype

Make volume_type updatable for cinder volume resource.
Notes: this feature support in volume api v2, to raise
NotSupported exception if the volume api version is v1
for volume_type updation.

Change-Id: I4b8b658a58ad0ef09763e99e9da8948cf72fed48
Closes-Bug: #1395975
Always update nested stacks

There's no reason to not issue an update to a nested stack, so don't bother
trying to decide if its inputs have changed (and especially don't replace
it because it's in a failed state). Overriding _needs_update() also allows
us to remove what was effectively an isinstance check from the previous
handling of failed states.

Change-Id: Ia48ebfcb6c1b3a904f01a83f8f34d8c7a13bb2be
Related-Bug: #1383618
Update testing-overview.txt

- update for actual tests directory structure used
- describe how to use tox to run only a subset of tests
- add hint on how to run tests when debuggers are used
- also remove non-existent heat/testing/README.rst from MANINFEST.in

Change-Id: I1441f79a006a4dfba2d7ee54ca6f4f7577205c0d
Remove *.pyc files on every tox run

As we start actively moving the code around (e.g. for resources
decoupling) stale *.pyc files might lead to cryptic failures when running
tox locally (and not from the freshly cloned repo as OpenStack Infra
does).
tox installs the package being tested in venv using development mode,
thus the actually tested code is from the repo working tree, so it is
beneficial to have it cleaned from pyc files before the test run.
Now removed run_tests.sh also had similar feature, but for DB migrations
only.

The files from .tox dir are left in place, as that might speedup the
tests run somewhat.

Change-Id: I91adfbc806111e2ab023199c5dea1ea7ebeca5da
Merge "Add cinder volume constraint for Cinder Volume"
Merge "Add cinder volume type constraint for resources"
Merge "Support cinder volume retype"
Get correct server_id when udpate Volume Attachment

Get the correct server id used for dettach the volume when
updating CinderVolumeAttachment.

Fixed bug #1402500

Change-Id: I3eeb24e6eab8335475d6a76d80a461765089c9c0
Check that template format plugins are registered

Otherwise log an error and exit

Change-Id: I2beb33371cf5e6701e22dbb41c8f5aa681c379de
Closes-Bug: #1402426
Merge "Always update nested stacks"
Merge "Check that template format plugins are registered"
Merge "Remove *.pyc files on every tox run"
Merge "Get correct server_id when udpate Volume Attachment"
Merge "Sync oslo modules"
Merge "Update testing-overview.txt"