move depends from samba to users

and remove slapd depend
removed s4sync
move samba daemon to users
remove heimdal management and slapd upstart script
change some ldap connections port

and other removals
some moving/merging between samba and users (WIP)
move DomainSettings to users
Merge branch 'master' into jacalvo/ldap-removal

Conflicts:
	main/samba/ChangeLog
	main/samba/src/EBox/Samba/Group.pm
	main/samba/src/scripts/s4sync
	main/users/ChangeLog
	main/users/src/EBox/Users/Group.pm
Removed samba_fs option from samba.conf, always use s3fs
move more code from samba to users
replace pam depends with SSS ones
Merge branch 'master' into jacalvo/ldap-removal
remove more kerberos/ldap stuff
users unit tests are now passing
use unix socket instead of tcp

and remove redundant unit test
moved unit tests to users
restore group addons
moved provision instance to users and keep compatibility in samba
add temporary depend on zentyal-samba

until both modules are decoupled or joined
Drop Users::LDAP in favor of Samba::LDB (merging some stuff)