Let `monit::params` use `$::osfamily` + `$::operatingsystem`

`$::osfamily` is for generic references to system configuration conditionals, while `$::operatingsysetm` and any `$::lsb*` facts are for more specific implementation.

Previously merged changes had a regression that lost platforms where `$::osfamily` did not match `$::lsbdistid` such as CentOS, and this commit revises the conditionals that enforced
this behaviour.