Soren Hansen 37d9591f7e Extend test_virt_driver to also test libvirt driver. ...

To support this, I've added a fake libvirt implementation. It's supposed
to expose an API and behaviour identical to that of libvirt itself
except without actually running any VM's or setting up any firewall or
anything, but still responding correctly when asked for a domain's XML,
a list of defined domains, running domains, etc.

I've also split out everything from libvirt.connection that is
potentially destructive or otherwise undesirable to run during testing,
and moved it to a new nova.virt.libvirt.utils. I added tests for those
things separately as well as stub version of it for testing. I hope
eventually to make it similar to fakelibvirt in style (e.g. keep track
of files created and deleted and attempts to open a file that it doesn't
know about, you'll get proper exceptions with proper errnos set and
whatnot).

Change-Id: Id90b260933e3443b4ffb3b29e4bc0cbc82c19ba6

2011-11-22 17:30:27 +01:00

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