CEC-1387 superset integration and removal of grafana (#138)

* replace grafana with superset

* updating snapshots

src/services/superset.js

@@ -0,0 +1,5 @@
+const SUPERSET_BASE_URL = process.env.REACT_APP_SUPERSET_URL;
+
+const SupersetDashboardURL = `${SUPERSET_BASE_URL}/r/3`;
+
+export { SupersetDashboardURL };