fix for controller namespace

Author: bohdan-harniuk

src/com/magento/idea/magento2plugin/actions/generation/dialog/NewEntityDialog.java

@@ -869,7 +869,7 @@ private void generateGridViewControllerFile() {
         final NamespaceBuilder namespace = new NamespaceBuilder(
                 getModuleName(),
                 "Listing",
-                getControllerDirectory()
+                ControllerBackendPhp.DEFAULT_DIR
         );
         new ModuleControllerClassGenerator(new ControllerFileData(
                 getControllerDirectory(),

src/com/magento/idea/magento2plugin/actions/generation/generator/util/NamespaceBuilder.java

@@ -25,11 +25,11 @@ public class NamespaceBuilder {
     public NamespaceBuilder(
             final String moduleName,
             final String className,
-            String classDirectory
+            final String classDirectory
     ) {
         this.moduleName = moduleName;
         this.className = className;
-        this.classDirectory = classDirectory.replaceAll(File.separator + "$", "");
+        this.classDirectory = classDirectory;
     }
 
     /**