TEMP improve ssh handling

- set correct permissions for .ssh
- append instead of replacing existing authorized_keys

real fix should be to use ssh-copy-id instead
Fixed EPEL RPM URL and lowered EPEL repository priority
Unified place for exceptions + started to getting rid of exception masking
Fixed exception issues
Merge pull request #43 from paramite/master

yum-plugin-priorities
Merge pull request #39 from apevec/master

fix ssh key distribution
Merge branch 'master' of github.com:fedora-openstack/packstack
Merge pull request #44 from paramite/master

Fixed exception issues
adding mysql account security class to clean test db and users
fixes BZ891700
Merge pull request #45 from radez/master

BZ891700: clean mysql test db and users
Create SSH key if none is set

Fixes #890822
Merge branch 'master' of github.com:fedora-openstack/packstack
Lowered verbosity of waitforpuppet
Packstack complete refactor and unittest coverage
Merge branch 'refactor' of github.com:paramite/packstack into refactor

Conflicts:
	packstack/installer/setup_controller.py
	packstack/installer/setup_sequences.py
	packstack/plugins/puppet_950.py
	packstack/tests/test_setup_controller.py
	packstack/tests/test_setup_sequences.py