Ldap modules should do a slaveSetup when slave mode enabled. Special treatment for mail module
Avoided hang when the local host is wrongly used as master slave
added dependency to new version of users
added commentart yo slaveSetup method
generalized for all dlap modules slaveSetupWarning and preSlaveSetup
Merge pull request #173 from Zentyal/jag/slave-setup-fixes

Fixed setup of LDAP modules in the slave