Use fixed network for ssh

This is a bit of a red herring.. we actually want to use floating,
and we configure that as ssh_connect_method=floating, but it
seems it still needs to know the name of the fixed network then.
Raise orchestration timeout

When tempest is run with a SLES image on the mkcloud host,
the configured timeout is too low, since both SLES takes forever
to boot and the hardware being very slow due to lack of
hugepages support for the nested virtualisation.
Configure tempest according to new enable_v3_api from nova barclamp
Merge pull request #100 from vuntz/nova-v3

Configure tempest according to new enable_v3_api from nova barclamp
Merge pull request #98 from dirkmueller/master

Use fixed network for ssh
Check if heat machine id file exists before cat'ing it

It might not exist if we don't have a heat test image.
Change order so that tempest appears and runs after all barclamps

It was still before the trove barclamp, and the chef recipes were run
too early too.
Merge pull request #103 from vuntz/order

Change order so that tempest appears and runs after all barclamps
Merge pull request #102 from vuntz/cat-non-existing-file

Check if heat machine id file exists before cat'ing it
Adapt code for Cinder Multi backend support
Enable multi-backend testing in cinder whenever possible