More memcache+datastore unit tests for BaseResolver.
More memcache+datastore unit tests for BaseResolver.

fernandalavalle/mlab-ns,fernandalavalle/mlab-ns,m-lab/mlab-ns,m-lab/mlab-ns,m-lab/mlab-ns,fernandalavalle/mlab-ns,m-lab/mlab-ns,fernandalavalle/mlab-ns