This commit add software-agent under pmon monitor for storage and
worker nodes.
Test Plan:
PASS: Kill software-agent process, verify it is started by pmon on
storage node.
PASS: Kill software-agent process, verify it is started by pmon on
worker node.
PASS: Check pmon.log related to the action above for both nodes.
PASS: Verify system install.
PASS: Verify pmond logs after a system install don't show that
pmond had to start the process.
Story: 2010676
Task: 50819
Change-Id: Ia16d774b96f8a793008a6850b6ead7603433625a
Signed-off-by: Luis Eduardo Bonatti <LuizEduardo.Bonatti@windriver.com>