Static fixes 2

Author: Vitaliy Boyko

src/com/magento/idea/magento2plugin/reference/provider/PhpClassReferenceProvider.java

@@ -52,8 +52,8 @@ public PsiReference[] getReferencesByElement(
         for (int i = 0; i < fqnParts.length - 1; i++) {
             namespacePart = fqnParts[i];
 
-            namespace.append("\\");
-            namespace.append(namespacePart);
+            namespace.append("\\");//NOPMD
+            namespace.append(namespacePart);//NOPMD
             final Collection<PhpNamespace> references =
                     phpIndex.getNamespacesByName(namespace.toString().toLowerCase(
                             new Locale("en","EN"))