feat(docker): fake data writer for opentsdb

docker/blocks/opentsdb/fig

@@ -2,4 +2,10 @@ opentsdb:
   image: opower/opentsdb:latest
   ports:
     - "4242:4242"
-    
+
+fake-data-gen:
+  image: grafana/fake-data-gen
+  net: bridge
+  environment:
+    FD_DATASOURCE: opentsdb
+