replcaing jsonutils with onaplib.json

Change-Id: I467ec46519f3fbe7d7d08e481f88bf7b20ffbbce
Issue-ID: TEST-158
Signed-off-by: DR695H <dr695h@att.com>
diff --git a/robot/resources/stack_validation/validate_common.robot b/robot/resources/stack_validation/validate_common.robot
index d189258..7d8ec96 100644
--- a/robot/resources/stack_validation/validate_common.robot
+++ b/robot/resources/stack_validation/validate_common.robot
@@ -3,7 +3,7 @@
 Library    OperatingSystem
 Library    SSHLibrary
 Library    RequestsLibrary
-Library    JSONUtils
+Library    ONAPLibrary.JSON
 Library    OpenstackLibrary
 Library    HEATUtils
 Library    Collections