Add ssl_protocol param to puppetdb & puppetdb::server classes

puppetdb::server calls puppetdb::server:jetty_ini,
jetty_ini is able to set ssl_protocols, but this param isn't
present in the puppetdb::server class nor in the puppetdb class
Merge branch 'fix-ssl-protocols'

* fix-ssl-protocols:
  Add ssl_protocol param to puppetdb & puppetdb::server classes