fuel: Enable all available scenarios for brahmaputra branch

fuel: Enable all available scenarios for brahmaputra branch

This change
- Enables all available scenarios for stable/brahmaputra branch on LF POD2
and Ericsson POD1.
- Enables new node type, virtual, which is able to run available scenarios.
- Adjusts build blocker for multijob projects.
- Skips cloning of fuel repo for multijob projects.
- Enables os_odl-l2_ha auto trigger for LF POD2, Ericsson POD1, and Ericsson
POD2.
- Enables the use of an already downloaded ISO if the ISO was previously
downloaded to jumphost to speed up deployment.
- Adds a generic job for fuel for easier CI development/troubleshooting which
is kept disabled by default.
- Removes SDN_CONTROLLER parameter.

Change-Id: Icf26241216522b58db6908623a77405cdaac2ba2
Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>