fix dependencies at setup.py

Change-Id: I338003728206b3934c07835e2f7a01a76ed1eda5
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/RO-SDN-onos_openflow/requirements.txt b/RO-SDN-onos_openflow/requirements.txt
index 44c797f..a6f6d65 100644
--- a/RO-SDN-onos_openflow/requirements.txt
+++ b/RO-SDN-onos_openflow/requirements.txt
@@ -14,5 +14,5 @@
 ##
 
 requests
-git+https://osm.etsi.org/gerrit/osm/RO.git#egg=osm-ro
+git+https://osm.etsi.org/gerrit/osm/RO.git#egg=osm-ro&subdirectory=RO