NetApp unit test fail fix for http_proxy

The environment having http_proxy settings caused
the unit tests to fail with 404 error. This fix
handles both situations with proxy or without
proxy settings.

Change-Id: I791a45adff654305db9f1fb6f039e91b11ba88d8
Closes-Bug:#1223145
Allow spaces in quoted SSH command arguments

The check_ssh_injection() method was rejecting arguments with spaces
even when they were quoted, this was causing problems with some volume
driver commands such as commands for a storage pool with spaces in the
name.

Closes-Bug: #1244415
Change-Id: Ie4b809e1b39fdb752cf634e6d3c0a3924d8ac52b
Merge "Allow spaces in quoted SSH command arguments"
Merge "NetApp unit test fail fix for http_proxy"
Merge commit '7e9fe3452350f0d63d9325a8af9314e876a206e0' into HEAD