SEBA-462 Implement UnloadModels cleanup behavior

Change-Id: If6495255fe9705140755a33c6c017a5f3b23da2d
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index a608e77..5c3e90c 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:2.1.49
+FROM xosproject/xos-base:2.1.50
 
 # xos-base already has protoc and dependencies installed