[stable/prometheus-operator] Fix #15819 datasource config from k8s secrets (#15855)

* [stable/prometheus-operator] Fix #15819

Fix #15819 issue configuring datasources from kubernetes secrets

Changes in the stable/grafana charts allows for the recommended updating
and removal of datasources via kubernetes secrets. Older versions of
this chart do not allow this feature.

Signed-off-by: John Naulty <johnnaulty@bitgo.com>

* [stable/prometheus-operator] bump up minor version

This is adding feature, so minor version should be updaated, not patch
version.

Signed-off-by: John Naulty <johnnaulty@bitgo.com>

stable/prometheus-operator/Chart.yaml

@@ -11,7 +11,7 @@ name: prometheus-operator
 sources:
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 6.1.2
+version: 6.2.0
 appVersion: 0.31.1
 home: https://github.com/coreos/prometheus-operator
 keywords:

stable/prometheus-operator/requirements.lock

@@ -7,6 +7,6 @@ dependencies:
   version: 1.5.1
 - name: grafana
   repository: https://kubernetes-charts.storage.googleapis.com/
-  version: 3.5.13
-digest: sha256:f1b0b94a4f7a5f58dbb6f13007f9d3379a6f7cdd320b4ebdaf8c85da96b0b955
-generated: 2019-07-21T23:02:22.337700699+07:00
+  version: 3.7.3
+digest: sha256:d218557e23680982931e04a9fae4f308d0ce75a6515cc83ee9e5dadda65fbbb0
+generated: 2019-07-24T09:09:34.838754406-07:00

stable/prometheus-operator/requirements.yaml

@@ -11,6 +11,6 @@ dependencies:
     condition: nodeExporter.enabled
 
   - name: grafana
-    version: 3.5.*
+    version: 3.7.*
     repository: https://kubernetes-charts.storage.googleapis.com/
     condition: grafana.enabled