Radware LBaaS driver unit-testing enhancement

[Evgeny Fedoruk]

More Radware LBaaS driver unit-testing should be added

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/54155

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/54155
Committed: http://github.com/openstack/neutron/commit/3299eb3dfebde39f0bec73008c99976c0b852c89
Submitter: Jenkins
Branch: master

commit 3299eb3dfebde39f0bec73008c99976c0b852c89
Author: Evgeny Fedoruk <email address hidden>
Date: Mon Oct 28 10:43:10 2013 -0700

    Adds tests, fixes Radware LBaaS driver as a result

    Adding more tests for Radware LBaaS driver.
    Adding new exception module for the Radware lbaas driver.
    The base radware lbaas exception, called RadwareLBaasException,
    Several specific exceptions for different failures.
    Driver was changed for using new exceptions as well.
    Changing the way OperationsHandler obtains context.
    Always waiting 1 second before handling the operation
    next time, to prevent busy-wait requests on vDirect.
    Several code optimizations were done as well.

    Change-Id: I15f7845fc2575eedb62c47d15ee6c1cea08e22f5
    Closes-Bug: #1236741