Disable the dnsmasq service from starting at boot.
This is for feature parity with Centos 7.
Test Plan
PASS Build Package
PASS Build ISO
PASS Check for dnsmasq not starting at boot
PASS Check for dnsmasq running after unlock
Story: 2009221
Task: 45784
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: Id630ad34551939efa87ab52214076fb68406cdd4