SEBA-282 Update xos-tosca to use latest xosgenx

Change-Id: I73e628e331a69ba71014360162b18541f46f826e
diff --git a/Dockerfile b/Dockerfile
index c1ed397..e4f2354 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # docker build -t xosproject/xos-tosca:candidate .
 
 # xosproject/xos-tosca
-FROM xosproject/xos-client:2.1.17
+FROM xosproject/xos-client:2.1.18
 
 # Set environment variables
 ENV CODE_SOURCE .