Update rdo task with new options for supplying db password and epel repo use

In new packstack option to send db password become obsolete and need to supply new options
Also added steps to disable iptables

Change-Id: I616872283846dca7a7785e2e07b2402e6128b61b
Reset fab connections to openstack so that new connections per session be created when running in parallel mode

In Parallel mode, fab scripts are hung when reusing existing connection by multiple session.
To avoid this, remove the connections to openstack from the connections dict. Now get commands will
create new connections and they independently

Closes-Bug: 1382280

Change-Id: I0a89587eac79d8e1235f492c9454a9c3e088f1b7
Merge "Avoid zeroing of test files if source and dest are same"
Check if Openstack connection exists before trying to remove it from connections

Commit 08defa6a5ff7067e89565a49df69d9450394453c assumed that openstack connections will always exists in connections. However
when run just fab setup_vrouter, connections are not available and it fails

Change-Id: I5e31f929c63c9caad6047a551eed48f87cf91c63
Closes-Bug: 1382625
removing multi-tenency from testbed.Sanity provisioning was failing due to multi-tenency set as false

Change-Id: I097ba66b82e9a1a0d466136d3a79739c5a61ba68
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: I0a2eb3686ea37ebc7ace19c7a79a8d22a9123f5b
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: I1c1354f98c0ddb095519020e72767bd36767b4ae
Removing multi-tenency from testbed.

Sanity provisioning was failing due to multi-tenency set as false

Change-Id: I59f48ecabd68c3a5033c70425caad50baa820e13
Adding sample VGW configuration in sample testbed file.

Adding the required configuration to enable virtual gateway
in sample testbed file
Change-Id: I81cb7b835a2a8cb1934c78259571acd15cd23be0
Let yum installation from any repo

for Redhat dist, thirdparty packages will be installed from multiple repos

Change-Id: Ifaa81e1a55f9bb72e8d3a8fc1daeae541aed678e
Merge "Adding sample VGW configuration in sample testbed file."
Merge "Let yum installation from any repo"
Export some basic testbed details as shell env variables

Change-Id: I76161972a630bd5d378d296a8840e278d26260e5