SEBA-301 Add diff methods to ORM

Change-Id: I47622670bd6cb96b5574352670e24a111ff616a0
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index 0b197e7..c844f73 100644
--- a/containers/chameleon/Dockerfile.chameleon
+++ b/containers/chameleon/Dockerfile.chameleon
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # xosproject/chameleon
-FROM xosproject/xos-base:2.1.18
+FROM xosproject/xos-base:2.1.20
 
 # xos-base already has protoc and dependencies installed