investigate ldap and saml support from scratch

[vdelendik]

as of now auth/mock authentication is configured by default. let's prepare examples or even valid configurations for all supported auth schemas so we could just adjust properties and manage it on the setup phase without manual changes in docker-compose.yml

[vdelendik]

let's review how zebrunner/stf#524 if fixed, potentially we can removed authentication from mcloud at all keeping it on reporting side which is much more flexible.