1031008: Reload identity cert on entitlement/product dir changes

There seems to be a race condition b/w which directory change
events are fired, so we need to make sure that the identity
is refreshed on each event in cert_sorter.

In the case of this BZ, the GUI heard about the entitlement
directory change before the consumer cert directory change,
and did not have the identity refreshed in time causing the
error.