SEBA-513 Tosca engine should not require fields with Default set

Change-Id: Ic24522bc2924aa6d8f26c356a66865d173399938
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index 79debb6..786793e 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:2.2.10
+FROM xosproject/xos-base:2.2.11
 
 # xos-base already has protoc and dependencies installed