Add DEFAULT section to nova_config

nova_config now requires a section, add DEFAULT section.
Fix ceilometer client package name for Debian

The package name is python-ceilometerclient, not python-ceilometer.
python-ceilometer is a package providing python libraries required
by ceilometer to work.
Exclude 'master' branch from travis CI

'master' branch does not have the required files to make the build pass.
Fix various puppet-lint errors and warnings
Update puppetdoc for ceilometer::keystone::auth
Fix notification relationship

Relationship was referring to Service[ceilometer] which does not exist.
Merge remote-tracking branch 'mgagne/grizzly' into lint

Conflicts:
	manifests/db/mysql.pp
	manifests/db/mysql/host_access.pp
	manifests/keystone/auth.pp

Update some docs in the process
Update existing puppetdoc & add missing puppetdoc