Fix httpd::dev.

While writing acceptance tests for puppet-httpd we noticed that the
manifest of httpd::dev was not working on Ubuntu Trusty.

That is because httpd::dev was trying to install multiple package using
the wrong syntax. Also, the one of the modules for Ubuntu was wrong and
we updated to keep applying.

Co-Authored-By: Bruno Tavares <btavare@thoughtworks.com>
Co-Authored-By: Danilo Ramalho <dramalho@thoughtworks.com>

Change-Id: Ibe1e107417b4670902f74b8c2fedc0d9d927ce9b

manifests/dev.pp

@@ -14,8 +14,7 @@
 class httpd::dev {
   include ::httpd::params
 
-  package { 'apache_dev_package':
+  package { $httpd::params::apache_dev:
     ensure => installed,
-    name   => $httpd::params::apache_dev,
   }
 }

manifests/params.pp

@@ -47,7 +47,7 @@ class httpd::params {
       $mod_python_package = 'libapache2-mod-python'
       $mod_wsgi_package = 'libapache2-mod-wsgi'
       $ssl_package = 'apache-ssl'
-      $apache_dev  = ['libaprutil1-dev', 'libapr1-dev', 'apache2-prefork-dev']
+      $apache_dev  = ['libaprutil1-dev', 'libapr1-dev', 'apache2-dev']
       $vdir = '/etc/apache2/sites-enabled/'
     }
     default: {