Fix lambda passed to CacheLookupsMixin#fetch_object
Fix lambda passed to CacheLookupsMixin#fetch_object

Added issue #65 to evaluate if CacheLookupsMixin is still doing us any
good, or if it can be removed.
ondrocks/openconferenceware,mynameisfashanu/openconferenceware,ondrocks/openconferenceware,ondrocks/openconferenceware,mynameisfashanu/openconferenceware,mynameisfashanu/openconferenceware,mynameisfashanu/openconferenceware,osbridge/openconferenceware,osbridge/openconferenceware,osbridge/openconferenceware,ondrocks/openconferenceware,osbridge/openconferenceware