Make it clear context can be extended
Make it clear context can be extended

Signed-off-by: Doug Davis <ff3bde741799c0eff815b83a54eda3fc494df54f@us.ibm.com>

servicebroker/servicebroker,openservicebrokerapi/servicebroker,servicebroker/servicebroker,servicebroker/servicebroker,duglin/servicebroker