Include apache::mod::filter in apache::mod::deflate

This was already done in default mods, but this removes duplication and
allows use without default mods.

manifests/default_mods.pp

@@ -142,9 +142,6 @@
     include apache::mod::auth_basic
 
     if versioncmp($apache_version, '2.4') >= 0 {
-      # filter is needed by mod_deflate
-      include apache::mod::filter
-
       # authz_core is needed for 'Require' directive
       ::apache::mod { 'authz_core':
         id => 'authz_core_module',
@@ -167,19 +164,13 @@
       ::apache::mod { 'authz_core':
         id => 'authz_core_module',
       }
-
-      # filter is needed by mod_deflate
-      include apache::mod::filter
     }
   } else {
     if versioncmp($apache_version, '2.4') >= 0 {
       # authz_core is needed for 'Require' directive
       ::apache::mod { 'authz_core':
         id => 'authz_core_module',
       }
-
-      # filter is needed by mod_deflate
-      include apache::mod::filter
     }
   }
 }

manifests/mod/deflate.pp

@@ -7,6 +7,9 @@
 # @param notes
 #   A Hash where the key represents the type and the value represents the note name.
 # 
+# @param apache_version
+#   The version of apache being run.
+# 
 # @see https://httpd.apache.org/docs/current/mod/mod_deflate.html for additional documentation.
 #
 class apache::mod::deflate (
@@ -22,8 +25,14 @@
     'Output' => 'outstream',
     'Ratio'  => 'ratio',
   }
+  Optional[String] $apache_version = undef,
 ) {
   include apache
+
+  if versioncmp(pick($apache_version, $apache::apache_version), '2.4') >= 0 {
+    include apache::mod::filter
+  }
+
   ::apache::mod { 'deflate': }
 
   file { 'deflate.conf':

spec/classes/mod/deflate_spec.rb

@@ -5,6 +5,7 @@
 # This function is called inside the OS specific contexts
 def general_deflate_specs
   it { is_expected.to contain_apache__mod('deflate') }
+  it { is_expected.to contain_class('apache::mod::filter') }
 
   expected = "AddOutputFilterByType DEFLATE application/rss+xml\n"\
   "AddOutputFilterByType DEFLATE application/x-javascript\n"\