919700: Reload consumer identity after force subscribing.

New dependency injection has an identity singleton being used. In the
case of a register with --force, the identity was not being reloaded so
an autosubscribe would attempt as the previously registered consumer.
920091: Reload identity cert monitor in installed tab.

The installed tab now uses identity to lookup product valid date ranges.
This exposed a problem with how we monitor both entitlement directory,
and the identity cert for changes.

This is tricky because if we hook up monitors for entitlement dirs and
identity cert, and both change (which is the case in unregister), we
don't know which is going to trigger first. As such when either happens,
we have to reload identity explicitly.
Merge pull request #536 from candlepin/dgoodwin/force-autosub

Dgoodwin/force autosub