PJSM-217: Create minion install package with Chef

 - Use base install CentOS 7.0
 - Install latest Oracle JDK 7
 - Install and configure OpenNMS yum repository with default for PJSM-2.0 branch
 - Install Minion from repository
 - Enable service and start by default
 - Create attributes for central OpenNMS Dominion
Merge pull request #1 from indigo423/master

PJSM-217: Create minion install package with Chef