Update clj-parent to 1.2.1
Update clj-parent to 1.2.1

Also remove our forward-pinning of tk-jetty, as clj-parent now comes with
version 2.0.1.

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