Merge pull request #380 from omerlh/prom-all-namespaces

added patch to allow prom to watch all namespaces

jsonnet/kube-prometheus/kube-prometheus-all-namespaces.libsonnet

+local k = import 'ksonnet/ksonnet.beta.4/k.libsonnet';
+
+{
+    prometheus+:: {
+        clusterRole+: {
+            rules+: 
+            local role = k.rbac.v1.role;
+            local policyRule = role.rulesType;
+            local rule = policyRule.new() +
+                            policyRule.withApiGroups(['']) +
+                            policyRule.withResources([
+                            'services',
+                            'endpoints',
+                            'pods',
+                            ]) +
+                            policyRule.withVerbs(['get', 'list', 'watch']);
+            [rule]
+      },
+    }
+}
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