Updated openstack/openstack
Project: openstack/tempest  3b2866066df46091200f870c593ebaa3e868e652

Fixing casual failing of nc service in LBaaS

Netcat quits after first web connection to it, causing test
to fail with HTTP 503 error. In Cirros 0.3.3 nc doesn't support
"-ll" option for persistence listening.
Added catching HTTP exceptions, and infinite cycle for netcat.
Fixed network finding. Fixed command string to be more pythonic.
Closes-Bug: #1384708

Change-Id: Ib9c9cd3d0040003d0296426d8a7ce800c193f22b