Clustered NiFi can take a while to load and prevent Kylo from building the NiFi Flow cache
Description
1. Start a NiFi cluster
2. Start Kylo
3. Kylo will wait until it gets a nifi connection before loading the NiFi Flow Cache.
4. NiFi will be up and Kylo will try to build the cache, but the REST api will be down and the method will say: "awaiting cluster coordination"
This will prevent Kylo from processing jobs/steps
One thing to note the /flow/process-group should return application/json; however in this case it returns plain text which causes issues when listening for this type of exception in the NiFi Rest Client
Environment
None
