Create/update ldap or ldap-cert authenticator in Console

This is to cover the scenario of creating/updating new Authenticator of ldap type.

Ldap spec:

• Ldap with user bind: https://balsamiq.cloud/sjvkm7s/pl9yeyv/r6DA0

• Ldap with system bind: https://balsamiq.cloud/sjvkm7s/pl9yeyv/rC9BD

• Ldap (user or system bind) when authentication only option is selected: https://balsamiq.cloud/sjvkm7s/pl9yeyv/rC0F2

Ldap-cert spec: https://balsamiq.cloud/sjvkm7s/pl9yeyv/r4BEA. Note the ldap-cert form is the same like ldap with system bind, however the bind as drop down list on the form shall be disabled and fixed on 'system'