agent: Change the string maching
agent: Change the string maching

Chnage the string maching when compering it
to 'hosted-engine --vm-start' output

Bug-Url: https://bugzilla.redhat.com/1860927
Change-Id: I7f179cb74791f8e9065c3fed289d1f49eb608336
Signed-off-by: Asaf Rachmani <cf92fa3c4cb4b8f0f0e8907fa43b1321425f3c89@redhat.com>

oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha