MUSST: add a _reset_cmd() to clear __last_md5 Cache on a RESET
when command RESET is sent to the MUSST, it clears the program.
Next upload_program()
will not load anything because it is not aware of the RESET
that just occured, and rely on __last_md5
cached hash to know if a new program needs to be reloaded.
This new _reset_cmd()
also clears __last_md5
cache when calling board RESET
, allowing next upload_program()
to happen.