Merge pull request #8 from AAROC/master

merging dev with master
Started working on the dev branch.
We will be re-working the playbooks to use roles
added group vars for umd3 and kenet's inventory
Merge branch 'dev' of https://github.com/AAROC/ansible-for-grid into dev
Tested the bootstrap playbook - now working except that it seems the reboot and sshd restart are not triggered
Moving to new role-based playbooks
Moving towards role-based playbooks
Moved some stuff into yaim roles
Now working site-bdii deployment with YAIM
Working on roles. Using @arcimboldo 's ansible playbooks as inspiration
Still working on WMS deployment in roles.
Some progress towards the WMS deployment using roles.
fixing the certificates
  - Added UMD role (not UMD3 - more generic)
  - moved Certs to a special role, out of common
  - site playbook contains almost all roles
  - started work on sam-nagios role
WMS playbook working
working on finalishing the SAM-NAGIOS playbook
Testing full core services deployment
  1. cleaned out passwords
  1. tested CREAM-CE deployment - works.
Major additions to dev branch -tested services :

 1. site-bdii
 1. top-bdii
 1. wms
 1. sam-nagios
 1. cream-ce
Added new site inventory for za-ufs
re-worked the site playbook somewhat, separating the bootstrap play
updating stuff for ZA-UFS