Fixes Bug 2321

Add specific channel for MongoDB charm

Fixes bug 2321

Change-Id: I8421e18797f6b375c7dded5782c1ad8a956d21ed
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>

installers/full_install_osm.sh

@@ -301,7 +301,7 @@ EOF"
 function deploy_charmed_services() {
     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
     juju add-model $OSM_NAMESPACE $OSM_VCA_K8S_CLOUDNAME
-    juju deploy ch:mongodb-k8s -m $OSM_NAMESPACE
+    juju deploy ch:mongodb-k8s -m $OSM_NAMESPACE --channel latest/stable
     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 }