after reboot of node make sure ssh process is active before declaring node as UP

Change-Id: I1b9877ad884c9234de59d876d8d13989809af81b
Closes-Bug: #1377511
Issue: rabbit_host in cinder is configured to use storage-master
       instead of config node
Fixed by configured rabbit_host to config node

Change-Id: Ia2268985607f091090f45771ea2b803ac50d0c0b
Closes-Bug: #1377385
Issue: nfs qcow2 image is not available in openstack node
Fix: if the openstack node is different from config node
     then copy the image to openstack node

Change-Id: Iba927da8a66575727201e8c19628fe6e27566a7f
Adding reimage flag to skip/do reiamge as part of install/provision in bringup_test_setup task.

Change-Id: I9fe7c51e2c14c6f22ff57f44c4d09cccf24e31f1