Add ipmitool as dependency on RHEL/Fedora systems

Conductor has problems if ipmitool is absent on dev
machines. So add ipmitool as install prerequisite.

Closes-Bug: #1387495
Change-Id: I0f52f63ab2478634f6650657fd120e14a9b7925b
Merge "Add ipmitool as dependency on RHEL/Fedora systems"