MULE-7986: Adding 0.0.0.0 lookup if no specific filter/server found and test case to make sure that scenario works. Adding logic to prevent 0.0.0.0 and specific IPs on the same port and tests to verify this and that having 2 configs with the same port and host is not allowed. Fixing bug in GrizzlyServerManager.
Merge pull request #1251 from mulesoft/MULE-7986

MULE-7986: Adding 0.0.0.0 lookup if no specific filter/server found and ...