Build: Develop 880

Repro Steps:

1. Create cluster "catest" under "sparkwatchdog-c08"
2. Right click on "catest", click "Submit Job", input valid value, click "Apply" to save the config file.
3. Create cluster "catest" under "sparkwatchdog-c09"
4. Right click on "catest", click "Submit Job"

Result:
The config file in step 2 populated.

Expect:
The clusters with the same name share one config file, should allow to create different configs for them.