dev: ensure gems are available for data bags validation
dev: ensure gems are available for data bags validation

Certain gems are required for data bag validation, so we need to
ensure they are installed before performing validation.  We want
to avoid hardcoding those dependencies in ./dev, since that violates
DRY (they're already in Gemfile) and they may later change.  So
we just move validation after the existing bundle install.  It's
also necessary to run via bundle exec.

rhafer/crowbar,rhafer/crowbar,nkrinner/crowbar,aspiers/crowbar,rsalevsky/crowbar,dirkmueller/crowbar,crowbar/crowbar,tserong/crowbar,MaximilianMeister/crowbar,mmnelemane/crowbar,SUSE-Cloud/crowbar,vwallfahrer/crowbar,SUSE-Cloud/crowbar,dirkmueller/crowbar,rhafer/crowbar,aplanas/crowbar,aspiers/crowbar,toabctl/crowbar,aplanas/crowbar,crowbar/crowbar,tserong/crowbar,mmnelemane/crowbar,nkrinner/crowbar,toabctl/crowbar,MaximilianMeister/crowbar,rsalevsky/crowbar,vwallfahrer/crowbar