Add package_manage parameter to haproxy install

Author: chrisongthb

manifests/install.pp

@@ -2,6 +2,7 @@
 #   Install haproxy
 # @api private
 define haproxy::install (
+  Boolean $package_manage,
   # lint:ignore:140chars
   Variant[Enum['present', 'absent', 'purged', 'disabled', 'installed', 'latest'], String[1]] $package_ensure,
   Optional[String]  $package_name     = undef,  # A default is required for Puppet 2.7 compatibility. When 2.7 is no longer supported, this parameter default should be removed.
@@ -11,7 +12,7 @@
     fail("Use of private class ${name} by ${caller_module_name}")
   }
 
-  if $package_name != undef {
+  if $package_manage {
     package { $package_name:
       ensure => $package_ensure,
       alias  => 'haproxy',