add ssl_protocol param in puppetdb::server and puppetdb

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' of https://github.com/bastelfreak/puppetlabs-puppetdb into fix-ssl-protocols