[CORD-2565] Recursively iterate on service folders to find xproto

Change-Id: I7d97bf4956b56d0f0048b96b64c134d04cf53773
diff --git a/docs/venv-xosdocs.sh b/docs/venv-xosdocs.sh
index a1c4dfa..963b1d8 100755
--- a/docs/venv-xosdocs.sh
+++ b/docs/venv-xosdocs.sh
@@ -33,5 +33,5 @@
 
 # install pip packages
 pip install -e $BASEDIR/$VENVDIR/../../lib/xos-genx
-pip install plyxproto jinja2 pattern astunparse pyyaml
+pip install plyxproto jinja2 pattern astunparse pyyaml colorama