Pds mer mi test (#4959)

* pushing what I have for now, need to finish the mermi test

* need to fix mermi tpl to pass test still

* updated template and test, note test is still failing

* fixed test & template

* added file for testing

* added case two for MerMI test and it's required IMG file, as well as removing full path from cropt_mer notebook

* removed full paths from IMG files