nmci: always "reset-failed" for nmci.nmutil.start_NM_service()
Commit 8140d319 ('nmutil: add possibility to reset service when starting') added a "reset" argument to nmci.nmutil.start_NM_service().
That is right and makes sense.
However, it basically never makes sense to not reset the fail counter. Change the default of the argument, to always reset.
See also commit 762701af ('service: don't use reset=False for nmci.nmutil.restart_NM_service()') which does the same for restart.