HWI and FOS integration

gistfile1.yml

config.yml:
```
fos_user:
    db_driver: orm # other valid values are 'mongodb', 'couchdb' and 'propel'
    firewall_name: main
    user_class: AppBundle\Entity\User

    from_email:
        address:        %mail_sender_address%
        sender_name:    %mail_sender_name%

    registration:
        form:
            type: modlette_user_registration
        confirmation:
            enabled:    true

hwi_oauth:
    # name of the firewall in which this bundle is active, this setting MUST be set
    firewall_name: main

    fosub:
        properties:
            linkedin: "linkedinId"

    connect: ~
    #        confirmation: true # should show confirmation page or not
    #        registration_form_handler: my_registration_form_handler
#            registration_form: oauth.user.registration.form.type
    #        account_connector: my_link_provider # can be the same as your user provider

    # an optional setting to configure a query string parameter which can be used to redirect
    # the user after authentication, e.g. /connect/facebook?_destination=/my/destination will
    # redirect the user to /my/destination after facebook authenticates them.  If this is not
    # set then the user will be redirected to the original resource that they requested, or
    # the base address if no resource was requested.  This is similar to the behaviour of
    # [target_path_parameter for form login](http://symfony.com/doc/2.0/cookbook/security/form_login.html).
    # target_path_parameter: _destination

    # an optional setting to use the HTTP REFERER header to be used in case no
    # previous URL was stored in the session (i.e. no resource was requested).
    # This is similar to the behaviour of
    # [using the referring URL for form login](http://symfony.com/doc/2.0/cookbook/security/form_login.html#using-the-referring-url).
    # use_referer: true

    # here you will add one (or more) configurations for resource owners
    # and other settings you want to adjust in this bundle, just checkout the list below!
    resource_owners:
        linkedin:
            type:           linkedin
            client_id:      %linkedin_client_id%
            client_secret:  %linkedin_client_secret%
            scope:          %linkedin_scopes%

```

security.yml:

```
security:
    encoders:
        FOS\UserBundle\Model\UserInterface: bcrypt

    role_hierarchy:
        ROLE_ADMIN:       ROLE_USER
        ROLE_SUPER_ADMIN: ROLE_ADMIN

    providers:
        fos_userbundle:
            id: fos_user.user_provider.username_email

    firewalls:
        main:
            pattern: ^/
            form_login:
                login_path:     "/login"
                provider: fos_userbundle
                csrf_provider: security.csrf.token_manager
            logout:       true
            anonymous:    true
            oauth:
                resource_owners:
                    linkedin:      "/oauth/login/check-linkedin"
                login_path:        "/login"
                check_path:        "/oauth/login/login_check"
                use_forward:       false
                failure_path:      "/oauth/login"

                oauth_user_provider:
                    service: hwi_oauth.user.provider.fosub_bridge

    access_control:
        - { path: ^/login$, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/oauth/login$, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/register, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/resetting, role: IS_AUTHENTICATED_ANONYMOUSLY }
        …
```