Changes to make SFC deployments functional

Changes to make SFC deployments functional

Fixes include:
 - sfc deployments now are non-HA, and disable swift and ringbuilder as
it causes issues with the 3.13 kernel
 - ODL Features boot is now parameterized in heat templates
 - SFC features boot is now set to "odl-ovsdb-sfc-rest"
 - Coexistence table offsets included if SFC deployment
 - VXLAN workaround applied for 123.123.123.x subnet if SFC

Change-Id: Ide5e0b451adcb98c417e57628a51302f3123647f
Signed-off-by: Tim Rozet <trozet@redhat.com>
(cherry picked from commit 13984a4de5090f961b2cf2c1923ffa72f1488343)