crypto import fails on non-case sensitive filesystem

[Vish Ishaya]

Trying to run nova from a case insensitive filesystem gives the following traceback:

+ /opt/stack/nova/bin/nova-manage db sync
Traceback (most recent call last):
  File "/opt/stack/nova/bin/nova-manage", line 81, in <module>
    from nova import crypto
  File "/opt/stack/nova/nova/crypto.py", line 34, in <module>
    import Crypto.Cipher.AES
  File "/opt/stack/nova/nova/Crypto.py", line 34, in <module>
    import Crypto.Cipher.AES
ImportError: No module named Cipher.AES

It interprets import Crypto as importing the local crypto instead of the global one.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/3719

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3719
Committed: http://github.com/openstack/nova/commit/b863fb3744170e5aa44083fd53fa92b3b9c3fb04
Submitter: Jenkins
Branch: master

commit b863fb3744170e5aa44083fd53fa92b3b9c3fb04
Author: Vishvananda Ishaya <email address hidden>
Date: Thu Feb 2 15:24:34 2012 -0800

    Make crypto use absolute imports

     * Fixes bug 925792
     * Cleans up some extra imports as well

    Change-Id: Ibea2411f552747e074c8d2e96468e3b09bf9c9c9