fix boto error upstream by adding AWS variables

Author: jessebot

charts/cloudnative-pg-cluster/templates/cnpg_cluster.yaml

@@ -4,6 +4,13 @@ kind: Cluster
 metadata:
   name: {{ .Values.name }}
 spec:
+  # this solves an issue with an old boto version
+  env:
+    - name: AWS_REQUEST_CHECKSUM_CALCULATION
+      value: when_required
+    - name: AWS_RESPONSE_CHECKSUM_VALIDATION
+      value: when_required
+
   postgresUID: {{ include "cluster.postgresUID" . }}
   postgresGID: {{ include "cluster.postgresGID" . }}
   instances: {{ .Values.instances }}