Support LDAP servers where one doesn't first have to bind to the LDAP  server with a username/password (#3002)
Support LDAP servers where one doesn't first have to bind to the LDAP  server with a username/password (#3002)

* Support LDAP servers where one doesn't first have to bind to the LDAP server with a username/password

* Address code climate things

getredash/redash,alexanderlz/redash,alexanderlz/redash,getredash/redash,denisov-vlad/redash,denisov-vlad/redash,getredash/redash,alexanderlz/redash,alexanderlz/redash,denisov-vlad/redash,denisov-vlad/redash,denisov-vlad/redash,getredash/redash,getredash/redash