add backwards compatibility for extraContainers

Author: cgroschupp

filebeat/templates/daemonset.yaml

@@ -167,5 +167,12 @@ spec:
 {{ toYaml .Values.extraVolumeMounts | indent 8 }}
         {{- end }}
       {{- if .Values.extraContainers }}
+      # Currently some extra blocks accept strings
+      # to continue with backwards compatibility this is being kept
+      # whilst also allowing for yaml to be specified too.
+      {{- if eq "string" (printf "%T" .Values.extraContainers) }}
 {{ tpl .Values.extraContainers . | indent 6 }}
+      {{- else }}
+{{ toYaml .Values.extraContainers | indent 6 }}
+      {{- end }}
       {{- end }}