[minor] Add support for SMTP disabledTemplates (#263)

Author: tomklapiscak

instance-applications/130-ibm-mas-smtp-config/templates/02-ibm-mas_SmtpCfg.yaml

@@ -30,3 +30,7 @@ spec:
     defaultShouldEmailPasswords: {{ .Values.suite_smtp_default_should_email_passwords }}
     credentials:
       secretName: "{{ .Values.mas_config_name }}-credentials"
+{{- if .Values.suite_smtp_disabled_templates }}
+    disabledTemplates:
+      {{ .Values.suite_smtp_disabled_templates | toYaml | nindent 6 }}
+{{- end }}