A few elements were needed to define specific repositories.
amphora-agent: Updated and now buids with sysvinit instead
of upstart Octavia requries the use_upstart parameter to be set
to False to work with RHEL systems.
amphora-agent-ubuntu: original element that supported upstart
keepalived-octavia: Supports RHEL repositories
Change-Id: I961663d105ad09e7f05c77cb92efaa469f386fdc
Closes-Bug: #1531092