Allow only-active when no query is specified.
Allow only-active when no query is specified.

Previously, the --only-active option only worked when
specified in combination with a query.

This commit adds support for searching for all active nodes
with an empty query.

unki/puppet-puppetdbquery,natemccurdy/puppet-puppetdbquery,baptistejammet/puppet-puppetdbquery,danieldreier/puppet-puppetdbquery,gwdg/puppet-puppetdbquery,dalen/puppet-puppetdbquery,MelanieGault/puppet-puppetdbquery,gcmalloc/puppet-puppetdbquery,redhat-cip/puppet-puppetdbquery,pyther/puppet-puppetdbquery,ccin2p3/puppet-puppetdbquery