[gcu][dhcp_relay] Fix dhcp_relay container is not running in gcu test #16460
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Description of PR
Summary:
Fixes # (issue)
Type of change
Back port request
Approach
What is the motivation for this PR?
In gcu dhcp_relay test, it would add 2 vlans with 4 dhcp servers. Previously all 8 dhcp servers are added by cli separately, it would restart dhcp_relay container 8 times, which would cause dhcp_relay container is not running in gcu test in some low performance devices.
How did you do it?
Use sonic-db-cli to add dhcp servers, then manually resetart dhcp_relay container once.
How did you verify/test it?
Run tests
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation