t_pf_user.last_password_change.
LastPasswordChange is now from type Date instead of Long.
UserDao.onPasswordChange(PFUserDO, String).
PF-480: Support of samba fields: sambaAcctFlags, sambaPasswordHistory and sambaPwdLastSet in LDAPMasterHandler.
Merge branch 'master' into multi-tenancy

* master:
  PF-480: Support of samba fields: sambaAcctFlags, sambaPasswordHistory and sambaPwdLastSet in LDAPMasterHandler.
  UserDao.onPasswordChange(PFUserDO, String).
  LastPasswordChange is now from type Date instead of Long.
  t_pf_user.last_password_change.

Conflicts:
	src/main/java/org/projectforge/database/DatabaseCoreUpdates.java