Add PodDisruptionBudget Kind when checking for existing versions (#923)

Checking for existing version using just "policy/v1" doesn't work when running helm template,
and as a result helm will generate a version of PodDisruptionBudget that is not supported by the cluster 
(see cortexproject/cortex-helm-chart#277).

The workaround is to add Kind to the '.Capabilities.APIVersions.Has' check so that 'helm template' will generate the right version of the PodDisruptionBudget resource.

charts/consul/templates/server-disruptionbudget.yaml

@@ -1,7 +1,7 @@
 {{- if (and .Values.server.disruptionBudget.enabled (or (and (ne (.Values.server.enabled | toString) "-") .Values.server.enabled) (and (eq (.Values.server.enabled | toString) "-") .Values.global.enabled))) }}
 # PodDisruptionBudget to prevent degrading the server cluster through
 # voluntary cluster changes.
-{{- if .Capabilities.APIVersions.Has "policy/v1" }}
+{{- if .Capabilities.APIVersions.Has "policy/v1/PodDisruptionBudget" }}
 apiVersion: policy/v1
 {{- else }}
 apiVersion: policy/v1beta1

charts/consul/test/unit/server-disruptionbudget.bats

@@ -127,7 +127,7 @@ load _helpers
   cd `chart_dir`
   local actual=$(helm template \
       -s templates/server-disruptionbudget.yaml \
-      --api-versions 'policy/v1' \
+      --api-versions 'policy/v1/PodDisruptionBudget' \
       . | tee /dev/stderr |
       yq -r '.apiVersion' | tee /dev/stderr)
   [ "${actual}" = "policy/v1" ]