Zabbix

A......... [DEV-3009] introduced clamping for mitigation of timing attacks

* commit '90feeea7f57e10093e7991b493aea2314e98c83b':
  .......... [DEV-3009] updated error message in autotest
  A......... [DEV-3009] made time equalizing managable for LDAP case; replaced displaying custom LDAP system errors with main login error message
  A......... [DEV-3009] introduced clamping for mitigation of timing attacks