convert template to EPP, fix tests

manifests/config.pp

@@ -13,7 +13,9 @@
   }
   -> file { "${thumbor::cfg_path}/thumbor.conf":
     ensure  => $thumbor::ensure,
-    content => template('thumbor/thumbor.conf.erb'),
+    content => epp('thumbor/thumbor.conf.epp', {
+        _default_config => $_default_config,
+    }),
     owner   => $thumbor::user,
     group   => $thumbor::group,
     mode    => '0644',

spec/default_facts.yml

@@ -6,3 +6,7 @@ ipaddress: "172.16.254.254"
 ipaddress6: "FE80:0000:0000:0000:AAAA:AAAA:AAAA"
 is_pe: false
 macaddress: "AA:AA:AA:AA:AA:AA"
+
+# XXX: This is required for unit tests, because the
+# pyvenv defined type requires a valid python version.
+python3_version: '3.8.12'

templates/thumbor.conf.epp

@@ -0,0 +1,15 @@
+<% $_default_config.keys.sort.each |$config_key| { -%>
+<%   if ($_default_config[$config_key] =~ Hash) { -%>
+<%= $config_key.upcase -%> = [
+<%     $_default_config[$config_key].flatten.each |$value| { -%>
+	'<%= $value -%>',
+<%     } -%>
+]
+<%   } elsif ($_default_config[$config_key] =~ Boolean) { -%>
+<%= $config_key.upcase %> = <%= $_default_config[$config_key].bool2str.capitalize %>
+<%   } elsif ($_default_config[$config_key] =~ Integer) { -%>
+<%= $config_key.upcase %> = <%= $_default_config[$config_key] %>
+<%   } elsif ($_default_config[$config_key] =~ String) { -%>
+<%= $config_key.upcase %> = '<%= $_default_config[$config_key] %>'
+<%   } -%>
+<% } -%>