Glance doesn't handle exceptions from glance_store

[Mike Fedosin]

Server API expects to catch exception declared at glance/common/exception.py, but actually risen exceptions have the same names but are declared at different module, glance_store/exceptions.py and thus are never caught.

For example, If exception is raised here: https://github.com/openstack/glance_store/blob/stable/kilo/glance_store/_drivers/rbd.py#L316 , it will never be caught here https://github.com/openstack/glance/blob/stable/kilo/glance/api/v1/images.py#L1107 , because first one is instance of https://github.com/openstack/glance_store/blob/stable/kilo/glance_store/exceptions.py#L198 , but Glance waits for https://github.com/openstack/glance/blob/stable/kilo/glance/common/exception.py#L293

There are many cases of that issue. The investigation continues.

[Mike Fedosin (mfedosin)]

Stack trace for this issue http://paste.openstack.org/show/325153/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/200000

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/200000
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=3fc57a4e0a1a655473024d31c4ebacc5921e78ec
Submitter: Jenkins
Branch: master

commit 3fc57a4e0a1a655473024d31c4ebacc5921e78ec
Author: Mike Fedosin <email address hidden>
Date: Thu Jul 9 11:04:44 2015 +0300

    Glance to handle exceptions from glance_store

    After the split glance_store raises its own exceptions, that
    have the same names as in glance. Several times those exceptions
    aren't caught in glance and it leads to incorrect behaviour.
    This code fixed it.

    Change-Id: I8600e0813ecbc599b5411e1fc0d0c9b470f68f6b
    Closes-Bug: #1469817