fixing Dockerfile local after changes in IM

Change-Id: I6a9f0cb2f8d71fa1711844a7ce86ed37f089230f
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/Dockerfile.local b/Dockerfile.local
index 8635e4b..f49bf2d 100644
--- a/Dockerfile.local
+++ b/Dockerfile.local
@@ -36,7 +36,7 @@
     && git -C /app clone https://github.com/robshakir/pyangbind \
     && pip3 install -e /app/pyangbind \
     && git -C /app clone  https://osm.etsi.org/gerrit/osm/IM \
-    && mkdir /app/IM/osm_im \
+    && mkdir -p /app/IM/osm_im \
     && pyang --plugindir /app/pyangbind/pyangbind/plugin -f pybind -p /app/IM/models/yang \
        -o /app/IM/osm_im/vnfd.py /app/IM/models/yang/vnfd.yang \
     && pyang --plugindir /app/pyangbind/pyangbind/plugin -f pybind -p /app/IM/models/yang \