Add sleep to cadu sender for ci tests

Give the rest of the application time before data starts arriving

ci_tests/values-grb-g16.yaml

@@ -7,6 +7,8 @@ uploadDst: "/dst"
 caduSender:
   enabled: true
   existingClaim: "geosphere-ci-tests-cadu"
+  env:
+    CADU_SLEEP: "60"
 persistence:
   enabled: true
   storageClass: longhorn