Moved loading to separate object. Added a unit test for loading the properties

src/main/java/org/owasp/webgoat/plugins/GlobalProperties.java

@@ -0,0 +1,24 @@
+package org.owasp.webgoat.plugins;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.List;
+
+public final class GlobalProperties {
+
+    private final Plugin plugin;
+
+    public GlobalProperties(Path pluginDirectory) {
+        this.plugin = new Plugin(pluginDirectory);
+    }
+
+    public void loadProperties(Path globalPropertiesPath) {
+        try {
+            List<Path> filesInDirectory = PluginFileUtils.getFilesInDirectory(globalPropertiesPath);
+            this.plugin.loadFiles(filesInDirectory, true);
+        } catch (IOException e) {
+            throw new IllegalStateException("Unable to load global properties, check your installation for the directory i18n: " + globalPropertiesPath.toString(), e);
+        }
+    }
+
+}