get_volume_api_version_from_endpoint currently assumes that the
management_url will always be in the format of
http://<ip>:<port>/vX/<tenant_id>. Customers using a gateway, however,
can get a mangement_url in a different form like
https://<ip>:<port>/<resource>/vX/<tenant_id>.  This causes the
get_volume_api_version_from_endpoint to find the resource portion of the
url when looking for the Volume API version which makes the
cinder client unusable.

To resolve this I have implemented an exception handler in the case that
get_volume_api_version_from_endpoint fails.  If the exception is thrown, I
check for OS_VOLUME_API_VERSION in the environment and use the value of that
environment variable, if it is set, to determine the API version to use.

There are proposals to fix this via changes to keystone in future releases,
but this provides a way for IaaS Gateway users to proceed with Havana.

Change-Id: I8b978a6ecd87b81c6ae34938e37623ad1cc33994
Closes-Bug: 1233311

Python3 changed the behavior of dict.keys such that it is now
returns a dict_keys object, which is iterable but not indexable.
You can get the python2 result back with an explicit call to list.

Refactor list(*.keys()) so that it just uses list().

Change-Id: Ib2e9646ac967e9bd7cc4f47e2099f5d1358808a9
Signed-off-by: Chuck Short <chuck.short@canonical.com>

On Python 2.6, this results in an error like:
/usr/lib/python2.6/site-packages/cinderclient/shell.py:524:
DeprecationWarning: BaseException.message has been deprecated as of
Python 2.6
  message = e.message

Should use the method from novaclient commit 8c4e145b92, which
works well with python2 and python3.

Change-Id: Ifbd78ad158ae87670bdee4e247469091efaa3260

NOTE:
* openstack/common/* should be synced from oslo, so i leave them
untouched.
* add (c) symbol for related lines, leave others untouched.

Change-Id: I46a87c7f248d3468b1fdf5661411962faf2fb875
Fixes-Bug: #1214176

Before v1 and v2 were set to the same service_type, so you could only
have one set at a time. This assumes the catalog is setup for v1
service_type 'volume' and v2 service_type 'volumev2'.

For backwards compatibility, we will allow v2 to be setup with
service_type 'volume' for existing installations.

Change-Id: Ife6d2cdb12d894b84ea3b276767fb93d487355d5

This reverts commit a7cce08eab5e2e42275b84bd56127bd09b00f5bf

Change-Id: I6c0047adbc33d0d6b5890f11853974578c36c78c

These exceptions can be used in novaclient, keystoneclient,
glanceclient, and other client projects.

Partially implements: blueprint common-client-library

Change-Id: I43918316622b1c1d722872fe30199db6a3a7bb76

Adds functionality which allows user to work with
that cinder API version which is the same as
the endpoint version.

Fixes: bug #1169455

Change-Id: I9bb46e602d15856d2da502a6ac2b6c25e76f4fa3