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.
Merge pull request #13 from hunner/fix_params

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