SEBA-419 allow legacy to be specified on a per-model basis;
Deprecate "legacy" in favor of "custom_python"

Change-Id: I44625ff18ee7796996ae25ad700e58a0b36e7398
diff --git a/containers/chameleon/Dockerfile.chameleon b/containers/chameleon/Dockerfile.chameleon
index 4e3c111..0d1a050 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:3.2.1
+FROM xosproject/xos-base:3.2.2
 
 # xos-base already has protoc and dependencies installed