Integration of OSM Charms with new MongoDB

Change-Id: I9e723dc94ff4c5b7e691179be4e9e3c7b43b6ab0
Signed-off-by: Dario Faccin <dario.faccin@canonical.com>
diff --git a/installers/charm/osm-ro/tox.ini b/installers/charm/osm-ro/tox.ini
index 0083afe..c974509 100644
--- a/installers/charm/osm-ro/tox.ini
+++ b/installers/charm/osm-ro/tox.ini
@@ -88,7 +88,7 @@
 description = Run integration tests
 deps =
     pytest
-    juju
+    juju<3
     pytest-operator
     -r{toxinidir}/requirements.txt
 commands =