(maint) Cleanup dependencies
(maint) Cleanup dependencies

Remove unused dependencies, and pickup metrics-clojure from clj-parent.
Bump to clj-parent 1.1.0 for the addition of metrics-clojure. We also
use ssl-utils in the core implementation, so move it out of test-only
dependencies into standard dependencies.

puppetlabs/pcp-broker,puppetlabs/pcp-broker,puppetlabs/pcp-broker