Specific permissions registry

[knstvk]

To use in REST and UI.
Now REST doesn't return custom specific permissions at all.

[gorbunkov]

1. SpecificPolicyInfoRegistry has been created. The registry returns a list of specific policies available in the application. In order to be "registered" the specific policy must have a SpecificOperationAccessContenxt, e.g.

public class UiLoginToUiContext extends SpecificOperationAccessContext {

    public static final String NAME = "ui.loginToUi";

    public UiLoginToUiContext() {
        super(NAME);
    }
}

2. The Specific policy editor in the Resource role editor now allows selecting a specific policy from the dropdown list. The combo-box supports user input, the user may grant a specific permission even it is not in the list.

3. The /rest/permissions REST API endpoint now returns information about granted specific policies

[owlet1997]

Check-list:

• combobox of specific permissions
• add new specific permission in Studio -> check in runtime
• write new specific permission in the combobox
• check REST url