use provided certificate files in client config if using activemq ssl

Only used in conjunction with $securityprovider => psk . Uses $ssl_.+ certificates from ::mcollective call. This provides an mcollective out-of-the-box on a node that provides all three components (activemq, mcollective-server, mcollective-client) like this:

class { '::mcollective':
      middleware_hosts   => [ $::fqdn ],
      middleware         => true,
      client             => true,
      middleware_ssl     => true,
      securityprovider   => 'psk',
      psk                => 'changemeplease',
    ssl_client_certs   => 'puppet:///modules/site_mcollective/client_certs',
    ssl_ca_cert        => 'puppet:///modules/site_mcollective/certs/ca.pem',
    ssl_server_public  => 'puppet:///modules/site_mcollective/certs/server.pem',
    ssl_server_private => 'puppet:///modules/site_mcollective/private_keys/server.pem',
}