If a completed command request on primary is mirrorable, a mirrored request will be send to secondary.
In mutitenant environment, we should attach dollar tenant to the mirrored request, otherwise, it cannot be handled correctly by secondary nodes. 

We also need to create a new jstest to verify the modification in multitenancy environment. Today, there are some mirrored read no passthrough test cases (eg, noPassthrough/mirror_reads.js). But, no core jstest cases for mirrored read. That's the reason the NTDI jscore passthrough test suit cannot cover it.