Add repository for cassandra image

Change-Id: I287b830f86da0fe0adc440cf9e645f8d244aefe1
Issue-ID: OOM-2368
Signed-off-by: afenner <andrew.fenner@est.tech>
diff --git a/kubernetes/common/cassandra/templates/statefulset.yaml b/kubernetes/common/cassandra/templates/statefulset.yaml
index 16aa27f..96139ce 100644
--- a/kubernetes/common/cassandra/templates/statefulset.yaml
+++ b/kubernetes/common/cassandra/templates/statefulset.yaml
@@ -28,7 +28,7 @@
       hostNetwork: {{ .Values.hostNetwork }}
       containers:
       - name: {{ include "common.name" . }}
-        image: {{ .Values.image }}
+        image: "{{ include "common.repository" . }}/{{ .Values.image }}"
         imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
         ports: {{ include "common.containerPorts" . | nindent 8  }}
         volumeMounts: