new json template for RelVal multi-run harvesting

@ticoann , I did not run this workflow yet, but at least I could inject and assign it.
Use this one for the multi-run harvesting validation.
This cache is only exist in cmsweb-testbed, ConfigCacheUrl is set to cmsweb.
The other 2 cache IDs are exist in cmsweb. Are we supposed to support the different cache location for DQMConfigCacheID and ConfigCacheID?