fix test

Author: anmolanmol1234

hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestWasbAbfsCompatibility.java

@@ -165,6 +165,7 @@ public void testwriteFile() throws Exception {
     Assume.assumeFalse("Namespace enabled account does not support this test",
         getIsNamespaceEnabled(abfs));
     assumeBlobServiceType();
+    Assume.assumeFalse("Not valid for APPEND BLOB", isAppendBlobEnabled());
     NativeAzureFileSystem wasb = getWasbFileSystem();
 
     Path testFile = path("/testReadFile");