Lock user account after x failed consecutive login attempts.

[mirceaalexandru]

• add configuration for this in Concorda Dashboard:
  • activate/disable this feature - default disabled
  • set the number of failed attempts after which the account is locked
• add column to sys_user to store the consecutive failed logins
• reset this counter on successful login.
• if counter > limit set account to active: false.
• add in Dashboard UI User list page action for enabling/disabling user - so administrator can enable user accounts
• send mail to user with details about account being disabled and link to enable that account