Added basic cloud-init test for RHOS and EC2

Added new customization template for cloud-init
Added a convenience function to the Select class
Removed a fixed bug from provisioning
Added new test for cloud-provisioning
Grab emails always
Grab events always
Initial commit with existing delete_vm.py script
Added deletion steps for templates for rhevm and vsphere.
Nightly images older than MRU_NIGHTLIES days will be deleted.
GPG signing for PR tester
Merge pull request #1418 from blrm/temp_changes

Template / VM deletion script updates
Merge pull request #1416 from mfalesni/force-mail-dump

Grab emails/events always
Merge pull request #1388 from psav/cloud-init

Added basic cloud-init test for RHOS/RHEV/EC2