removed java role (will replace by subtree from Ansible Galaxy
Squashed 'roles/java/' content from commit 2109485

git-subtree-dir: roles/java
git-subtree-split: 2109485617707501691930fb52e1bb0ec1a65c95
added roles/java as subtree from https://github.com/AnsibleShipyard/ansible-java.git
good .screenrc
common tasks for RedHat
enabled development tools in common redhat
refactored site.yml
cassandra role and playbook