Remove bootstrap dependency from validation
Remove bootstrap dependency from validation

This patch makes the bootstrap exec optionally
come before validation instead of enforcing the
relationship. This allows non-master nodes to
validate as well as the master, and prevents
issues where bootstrapping wasn't needed such
as when a node returns to an existing cluster.

cotocisternas/puppet-galera,twc-openstack/puppet-galera,javiergayala/puppet-galera,CSC-IT-Center-for-Science/puppet-galera,cybercom-finland/puppet-galera,clauded/puppet-galera,fraenki/puppet-galera,pixelpark/puppet-galera,guimaluf/puppet-galera,fuel-infra/puppet-galera,clauded/puppet-galera,twc-openstack/puppet-galera,CSC-IT-Center-for-Science/puppet-galera,michaeltchapman/puppet-galera,twc-openstack/puppet-galera,michaeltchapman/puppet-galera,gwdg/puppet-galera,fuel-infra/puppet-galera,guimaluf/puppet-galera,czhujer/puppet-galera,javiergayala/puppet-galera,michaeltchapman/puppet-galera,cotocisternas/puppet-galera,gwdg/puppet-galera,CSC-IT-Center-for-Science/puppet-galera,cybercom-finland/puppet-galera,gwdg/puppet-galera,czhujer/puppet-galera,cotocisternas/puppet-galera,javiergayala/puppet-galera,pixelpark/puppet-galera,clauded/puppet-galera,czhujer/puppet-galera,pixelpark/puppet-galera,cybercom-finland/puppet-galera,guimaluf/puppet-galera,fuel-infra/puppet-galera