mrp: replace 'magic number' usage of minus 2 in mrpdu_msg_eof compare with MRPDU_ENDMARK_SZ
mrp: add database reset functions to mmrp and mvrp
mrp: cpputests, remove unused in msrp_tests
mrp: cpputests, add mmrp and mvrp tests
mrp: cpputest, add applicant FSM test shell