Use a fixed time in register command integration tests
What does this MR do?
Uses a fixed time in the register command integration tests.
Why was this MR needed?
Fixes a flaky test.
What's the best way to test this MR?
It's pretty rare, but 1000 attempts ought to do it.
go test -run TestExecute_MergeConfigTemplate -tags integration -count 1000 ./commands