Update JAVA_HOME value
Set JAVA_HOME for all users.
Provide script to 'enter' the running image
Update PATH to include hadoop and accumulo.
Update PATH to find Zookeeper
Merge branch 'master' of https://github.com/medined/docker-builds into medined-master

Conflicts:
	accumulo/supervisord-accumulo.conf
Merge branch 'medined-master'