Puppetlabs remerge

Hi Nan,

I've reverted the params.pp to respect your wishes to wait until facter is fixed to support Amazon under OSfamily Redhat. I think this is due for release in Facter 1.7.

I've added support directory per db and replication sets.

I've also suppressed some of the line breaks in mongod.conf template so it's easier to read.

Cheers

-ActionJack