Getting conflicting errors from keystone module.

gistfile1.txt

root@dessalines-003:~# puppet agent -t 
Info: Retrieving plugin
Info: Loading facts in /var/lib/puppet/lib/facter/concat_basedir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/facter_dot_d.rb
Info: Loading facts in /var/lib/puppet/lib/facter/puppet_vardir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/pe_version.rb
Info: Loading facts in /var/lib/puppet/lib/facter/root_home.rb
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Invalid db connection mysql://keystone:@127.0.0.1/keystone at /etc/puppet/modules/ymd_ng/keystone/manifests/init.pp:254 on node dessalines-003.yourmessagedelivered.com
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

-----  

The complaining code looks like this:

class keystone(
<snip>
  $sql_connection   = 'sqlite:////var/lib/keystone/keystone.db',
<snip>
) {

<snip>

  if($sql_connection =~ /mysql:\/\/\S+:\S+@\S+\/\S+/) {
    require 'mysql::bindings::python'
  } elsif($sql_connection =~ /postgresql:\/\/\S+:\S+@\S+\/\S+/) {

  } elsif($sql_connection =~ /sqlite:\/\//) {

  } else {
    fail("Invalid db connection ${sql_connection}")
  }

-----  

This class is being invoked as follows:

  class { 'keystone':
               verbose => 'True',
           db_password => $hesco_openstack::params::mysql_root_password,
           admin_email => 'hesco@yourmessagedelivered.com',
        admin_password => $hesco_openstack::params::keystone_admin_password,
  glance_user_password => $hesco_openstack::params::glance_user_password,
    nova_user_password => $hesco_openstack::params::nova_user_password,
  cinder_user_password => $hesco_openstack::params::cinder_user_password,
 quantum_user_password => $hesco_openstack::params::quantum_user_password,
        public_address => $hesco_openstack::params::public_address,
           admin_token => 'random_uuid',
  }
        # catalog_type => 'sql',
      # sql_connection => $hesco_openstack::params::sql_connection,

-----  

hesco_openstack/manifests/params.pp -- 

class hesco_openstack::params {

  $sql_connection = 'mysql://keystone:secret@127.0.0.1/keystone'

  .  .  .  
  
-----  
  
When I attempt to include the sql_connection attribute, I get an error which looks like this:

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Invalid parameter sql_connection at /etc/puppet/modules/ymd_ng/openstack/manifests/init.pp:29 on node dessalines-003.yourmessagedelivered.com

-----  

which leaves me confused as to how to push past these errors to a successful catalogue compilation and run.