add new error message when creating large image over xfs filesystem

The following error messages should all work well.
1. Image size must be less than 8 EiB!
2. Invalid image size specified.
   Must be between 0 and 9223372036854775807.
Signed-off-by: NXueqiang Wei <xuwei@redhat.com>

qemu/tests/cfg/create_large_raw_img.cfg

@@ -11,7 +11,8 @@
         - over_xfs:
             file_sys = "xfs"
             image_size_large = 10240000T
-            err_info = "Image size must be less than 8 EiB!"
+            err_info = "Image size must be less than 8 EiB!;"
+            err_info = '${err_info}Invalid image size specified. Must be between 0 and 9223372036854775807.'
         - over_ext4:
             file_sys = "ext4"
             image_size_large = 16T

qemu/tests/create_large_raw_img.py

 import logging
 import os
+import six
 
 from avocado import TestError
 from avocado.utils import partition as p
@@ -25,6 +26,7 @@ def run(test, params, env):
     loop_img = os.path.join(root_dir, "loop.img")
     loop_size = int(params["loop_file_size"])
     file_sys = params["file_sys"]
+    err_info = params["err_info"].split(";")
 
     mnt_dir = os.path.join(root_dir, "tmp")
     large = QemuImg(params.object_params(large_img), mnt_dir, large_img)
@@ -38,11 +40,14 @@ def run(test, params, env):
     try:
         large.create(large.params)
     except TestError as err:
-        if params["err_info"] not in str(err):
+        for info in err_info:
+            if info in six.text_type(err):
+                break
+        else:
             test.fail("CML failed with unexpected output: %s" % err)
     else:
         test.fail("There is no error when creating an image with large size.")
-
-    part.unmount()
-    os.rmdir(mnt_dir)
-    os.remove(loop_img)
+    finally:
+        part.unmount()
+        os.rmdir(mnt_dir)
+        os.remove(loop_img)