Make the examples given for LDAP configuration more realistic for Windows AD

The example configuration parameters given here (especially the group names) are not very realistic for Windows AD. We should provide examples that are more similar to what users will need to enter.

For example, a Windows AD configuration would look more like:

mms.ldap.global.role.owner=CN\=MongoMMS-GlobalOwner,OU\=Mongo MMS,OU\=ACME Groups,DC\=acme,DC\=local