fix: [gogocarto] fix service from failing if mongo container is not present

gogocarto/hooks/mongo_database-relation-joined

@@ -40,6 +40,10 @@ db.Configuration.findOneAndUpdate(
    { \$set: { "dbName" : "$DBNAME"} }
 );
 EOF
+
+        info Removing cache before migration
+        rm -rf "$SERVICE_DATASTORE/var/cache/gogocarto/prod/"*
+        info Launch migration
         symphony db:migrate
     } || {
         err "Mongo database migration failed."