agent/lbaas: fix HAproxy package relationship

This patch fix this case:
- manage_haproxy_package is set to false
- puppetlabs-haproxy is not running
- we still want Neutron LBaaS working on the node
- we don't want at all the package managed by Puppet

Only set the dependency if the package is defined in the catalog.

Closes-bug #1340999
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Change-Id: Iee2211db8add4dfafba70706d69d1092339c6206

Author: Emilien Macchi

manifests/agents/lbaas.pp

@@ -55,8 +55,7 @@
 
   case $device_driver {
     /\.haproxy/: {
-      Package[$::neutron::params::haproxy_package] -> Package<| title == 'neutron-lbaas-agent' |>
-
+      Package <| title == $::neutron::params::haproxy_package |> -> Package <| title == 'neutron-lbaas-agent' |>
       if $manage_haproxy_package {
         ensure_packages([$::neutron::params::haproxy_package])
       }