[stable/6.1]Fix find_host for non-vcenter deployment
[stable/6.1]Fix find_host for non-vcenter deployment

After adding support of vcenter,
for tests where we check connectivity
by floating ip we start to ssh on compute if nova network is used. So this change start return controllers
ip in case if use_vcenter is false

Change-Id: I8952ee78e8b2b94a1998f57a59ae7fa33ddbf629
Closes-Bug: #1443893

mcloudv/fuel-ostf,eayunstack/fuel-ostf,stackforge/fuel-ostf,eayunstack/fuel-ostf,mcloudv/fuel-ostf,stackforge/fuel-ostf