Fix PossiblyUndefinedGlobalVariable (2x)

psalm.xml

@@ -7,6 +7,7 @@
     allowStringToStandInForClass="true"
 >
     <projectFiles>
+        <directory name="config-templates" />
         <directory name="lib/SimpleSAML" />
 
         <!-- Replaces all modules/... with this one-liner for 2.0
@@ -78,7 +79,7 @@
             </errorLevel>
         </UnresolvableInclude>
 
-        <!-- Ignore MissingFile on www-scripts - Remove for 2.0 -->
+        <!-- Ignore MissingFile on www-scripts - Remove when the last www-script is replaced by a controller -->
         <MissingFile>
             <errorLevel type="suppress">
                 <file name="www/*.php" />
@@ -86,6 +87,15 @@
             </errorLevel>
         </MissingFile>
 
+        <!-- Suppress PossiblyUndefinedGlobalVariable on templates -->
+        <PossiblyUndefinedGlobalVariable>
+            <errorLevel type="suppress">
+                <directory name="config-templates" />
+                <directory name="metadata-templates" />
+                <directory name="modules/adfs/metadata-templates" />
+            </errorLevel>
+        </PossiblyUndefinedGlobalVariable>
+
         <!-- Suppress PHPunit-issue -->
         <PropertyNotSetInConstructor>
             <errorLevel type="suppress">