Fix "Cache play already exists" on startup @11danny
Fix "Cache play already exists" on startup @11danny

This happens:
[ec2-user@dw0azewdbpv11danny debiki.se]$ sudo ./su-play-restart1.sh
App1 is not running.
Starting App1...
[ec2-user@dw0azewdbpv11danny debiki.se]$ Play server process ID is 1387
Oops, cannot start the server.
net.sf.ehcache.ObjectExistsException: Cache play already exists
  at net.sf.ehcache.CacheManager.addCache(CacheManager.java:990)
  at play.api.cache.EhCachePlugin.x$3(Cache.scala:111)
  at play.api.cache.EhCachePlugin.cache(Cache.scala:109)
  at play.api.cache.EhCachePlugin.onStart(Cache.scala:127)
  at play.api.Play$$anonfun$start$1.apply(Play.scala:60)
  at play.api.Play$$anonfun$start$1.apply(Play.scala:60)
  at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOpti...
  at scala.collection.immutable.List.foreach(List.scala:45)
  at play.api.Play$.start(Play.scala:60)
  at play.core.StaticApplication.<init>(ApplicationProvider.scala:51)
  at play.core.server.NettyServer$.createServer(NettyServer.scala:132)
  at play.core.server.NettyServer$$anonfun$main$5.apply(NettyServer...
  at play.core.server.NettyServer$$anonfun$main$5.apply(NettyServer...
  at scala.Option.map(Option.scala:133)
  at play.core.server.NettyServer$.main(NettyServer.scala:152)
  at play.core.server.NettyServer.main(NettyServer.scala)

debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old