Add option to adjoin for arguements

[amswain]

Currently adjoin does not allow the setting of an OU for machines that join the domain.

I suggest adding a parameter to your class called adjoin_args that can allow passing of different flags to the adjoin command:

init.pp: $adjoin_args = $centrify::params::adjoin_args,
params.pp: $adjoin_args = ''
service.pp: $adjoin_args = $centrify::adjoin_args
service.pp: command => "adjoin -w -u ${adjoin_user} -s ${adjoin_server} -p ${adjoin_password} ${adjoin_domain} ${adjoin_args}",

This way you can create:
$adjoin_args = '-c OU=Servers,OU=Linux,DC=example,DC=com' and put the machine accounts in AD in whichever ou you like.