Defect Fix for namespace with special character support in YANG

Change-Id: I8cc5b9dce58023c5965b07ac36cc4b5858f91699
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java
index a7e9860..2cfc3b9 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/utils/io/impl/YangIoUtilsTest.java
@@ -70,7 +70,7 @@
     @Test
     public void addPackageInfoWithEmptyPathTest() throws IOException {
 
-        File dirPath = new File("");
+        File dirPath = new File("invalid/check");
         thrown.expect(IOException.class);
         thrown.expectMessage("Exception occured while creating package info file.");
         YangIoUtils.addPackageInfo(dirPath, "check1", createPath);