Fix EIO attribute access

Author: zancas

test/functional/tm/ltm/test_profile.py

@@ -575,7 +575,7 @@ def test_MCURDL(self, request, bigip):
             with pytest.raises(iControlUnexpectedHTTPError) as iCUHEEIO:
                 ipoth.test_MCURDL(request, bigip)
             assert 'Found unexpected json pair at configuration item' in\
-                iCUHEEIO.message.value
+                iCUHEEIO.value.message
         else:
             ipoth.test_MCURDL(request, bigip)