Change Infinispan logging from WARN to INFO
Change Infinispan logging from WARN to INFO

Even though Infinispan INFO logging is still a bit verbose, cluster
membership messages are important.

glowroot/glowroot,trask/glowroot,glowroot/glowroot,trask/glowroot,glowroot/glowroot,trask/glowroot,trask/glowroot,glowroot/glowroot