Improve toString() representation of web session cache keys (org.wildfly.clustering.infinispan.spi.distribution.Key subclasses)

It might be just my ignorance, but it seems kinda weird anyway

• clusterbench-ee7.ear from web-cache-investigator branch
• 1 server, no balancer, trivial standalone-ha startup
• result is way too many records in the cache for a single session id:

  karm@localhost:~/Projects/MOD_CLUSTER/httpd-2.4.20-build/bin$ curl -c cookie.txt -b cookie.txt http://127.0.0.1:8080/clusterbench/debug
  Serial: 22
  Session ID: Ok6CfU2Az90jOVLJE_NkXPpBwDwq6YP5EwlbD5X-
  Current time: Tue May 31 11:25:25 CEST 2016
  ServletRequest.getServerPort(): 8080
  ServletRequest.getLocalPort(): 8080
  Node name: localhost
  Members: [localhost]
  Cache: clusterbench-ee7.ear.clusterbench-ee7-web-passivating.war, Size: 0
      Keys: []
  Cache: routing, Size: 1
      Keys: [localhost]
  Cache: clusterbench-ee7.ear.clusterbench-ee7-web-granular.war, Size: 0
      Keys: []
  Cache: clusterbench-ee7.ear.clusterbench-ee7-web-default.war, Size: 3
      Keys: [Ok6CfU2Az90jOVLJE_NkXPpBwDwq6YP5EwlbD5X-, Ok6CfU2Az90jOVLJE_NkXPpBwDwq6YP5EwlbD5X-, Ok6CfU2Az90jOVLJE_NkXPpBwDwq6YP5EwlbD5X-]
  Cache: dist, Size: 0
      Keys: []
  Physical addresses: 127.0.0.1:55200;
  
  
  karm@localhost:~/Projects/MOD_CLUSTER/httpd-2.4.20-build/bin$ cat cookie.txt 
  # Netscape HTTP Cookie File
  # http://curl.haxx.se/docs/http-cookies.html
  # This file was generated by libcurl! Edit at your own risk.
  
  127.0.0.1   FALSE   /clusterbench   FALSE   0   JSESSIONID  Ok6CfU2Az90jOVLJE_NkXPpBwDwq6YP5EwlbD5X-.localhost
  

WDYT?