Fix script dev_server

scripts/dev_server.sh

@@ -10,5 +10,5 @@ rm -r $STATEDIR
 mkdir $STATEDIR
 
 pushd src/main/webapp # serve this directory
-DRAWIOVERBOSE=1 node ../../collab/server/run_server.js --state-dir $STATEDIR
+DRAWIOVERBOSE=1 NODE_PATH=$NODE_PATH:../../collab/common node ../../collab/server/run_server.js --state-dir $STATEDIR
 popd