run etcd_container with type:spc_t label

roles/etcd/templates/etcd.docker.service

@@ -7,7 +7,7 @@ PartOf={{ openshift.docker.service_name }}.service
 [Service]
 EnvironmentFile={{ etcd_conf_file }}
 ExecStartPre=-/usr/bin/docker rm -f {{ etcd_service }}
-ExecStart=/usr/bin/docker run --name {{ etcd_service }} --rm -v {{ etcd_data_dir }}:{{ etcd_data_dir }}:z -v {{ etcd_conf_dir }}:{{ etcd_conf_dir }}:ro --env-file={{ etcd_conf_file }} --net=host --entrypoint=/usr/bin/etcd {{ openshift.etcd.etcd_image }}
+ExecStart=/usr/bin/docker run --name {{ etcd_service }} --rm -v {{ etcd_data_dir }}:{{ etcd_data_dir }}:z -v {{ etcd_conf_dir }}:{{ etcd_conf_dir }}:ro --env-file={{ etcd_conf_file }} --net=host --security-opt label=type:spc_t --entrypoint=/usr/bin/etcd {{ openshift.etcd.etcd_image }}
 ExecStop=/usr/bin/docker stop {{ etcd_service }}
 SyslogIdentifier=etcd_container
 Restart=always