Add release notes for 4.4.0
Add release notes for 4.4.0

rbrw/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb,rbrw/puppetdb,mullr/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,mullr/puppetdb