#### Why I did it
Since we will have multiple `dhcrelay` processes if there exists different VLANs in the table `VLAN_INTERFACE` of `CONIFG_DB`,
we should use unique service name for each `dhcrelay` process in Monit configuration file. Otherwise, Monit service will fail to work.
#### How I did it
I append the VLAN name to the end of each service name such that they are unique.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
aeae87d1b5