common: Fix duplicate parameters

Some parameters are declared twice :

      2 ceilometer_endpoint_type: {{ config.ceilometer_endpoint_type | default('"%{hiera(\'endpoint_type\')}"') }}
      2 glance_api_bind_options: {{ config.glance_api_bind_options | default('"%{hiera(\'haproxy_default_bind_options\')}"') }}
      2 glance_registry_bind_options: {{ config.glance_registry_bind_options | default('"%{hiera(\'haproxy_default_bind_options\')}"') }}
      2 horizon_listen_ssl: {{ config.horizon_listen_ssl | default('false') }}
      2 nova_endpoint_type: {{ config.nova_endpoint_type | default('"%{hiera(\'endpoint_type\')}"') }}

Signed-off-by: Dimitri Savineau <dimitri.savineau@enovance.com>