Add CLI admin api

after all works on Redis as provider will be finished we have to make admin interface for Ferrum configure

Admin interface must provide following common operations schema: {operation} {resource} {resource_id} {params} {value}

1. {operation} one of the 4 operation create, update, delete, get
2. {resource} - name of resource - realm, client, user
3. {namespace} - object namespace
4. {resource_id} - resource name i.e. name of realm, client, user
5. {params} additional params that requires for operations i.e. realm for client and user
6. {value} is a JSON that contains object value itself

i.e. consider Realm creation:

   ferrum-admin --operation=create --resource=realm --namespace=ferrum_2 --resource_id=IRP --value=\"{\"name\" "irp_rt\", ....}\"

If we provide full realm structure with client and user this data struct should be separated && created all objects at once

if we create a User we should operate with public user information (not show credentials), if we run user creation we should query user password && check password

additionally we have 2 additional methods

1. ferrum-admin --operation=change_password --namespace=ferrum_2 --resource=user --resource_id=admin
2. ferrum-admin --operation=reset_password --namespace=ferrum_2 --resource=user --resource_id=admin

reset_password resets password to randomly generated (8 symbols at least)

Techically ferrum-admin should be additional software located in /ferrum/api/admin/cli, management operations (except password operations) must be declared in DataContext interface