Allow disabling access to the DB and the Teams API.

Command-line options --nodatabaseaccess and --noteamsapi disable all
teams api interaction and access to the Postgres database. This is
useful for debugging purposes when the operator runs out of cluster
(with --outofcluster flag).

The same effect can be achieved by setting enable_db_access and/or
enable_teams_api to false.

pkg/cluster/sync.go

@@ -36,6 +36,9 @@ func (c *Cluster) SyncCluster(stopCh <-chan struct{}) {
 	if err := c.syncStatefulSet(); err != nil {
 		c.logger.Errorf("Can't sync StatefulSets: %s", err)
 	}
+	if c.DatabaseAccessDisabled() {
+		return
+	}
 	if err := c.initDbConn(); err != nil {
 		c.logger.Errorf("Can't init db connection: %s", err)
 	} else {