This fleshes out the review request reopened signals to include

information on what the status and public states were prior to

reopening. Consumers can use this to more intelligently determine

whether to take action on the reopen. For instance, it could decide not

to send a message to a service for a review request that was previously

unpublished and is now being reopened, or it could send a different

message when reopened from a discarded state vs. a submitted state.
Unit tests were added to test reopen functionality and resulting states,

including the new signal changes.

Unit tests pass.