Use ParameterizedClass for all auth-related implementations

Uses ParameterizedClass for IAuthorizer, INetworkAuthorizer, and
IRoleManager implementations enabling those to be configurable from
parameters specified directly in cassandra.yaml.

Opportunistically makes consistent the initialization and setting of
all auth-related implementations and removes code duplication.

Notes:
 * IInternodeAuthenticator implementations are expected to be set as
   default directly in DatabaseDescriptor instead of done via
   AuthConfig.applyAuth(). This is assumed in tests and client logic.
   For instance ReconnectableSnitchHelperTest fetches this authenticator
   before calling daemonInitialize(). Also, BulkLoader fetches this
   directly when creating an outbound connection.
 * Changing this behavior in BulkLoader causes a cascade of changes.
   First, one would need to add AuthConfig.applyAuth() directly in
   clientInitialize() and then would need to enable all the additional
   classes that this change causes. Long term this might be justified
   as if we're depending on the auth logic to be properly set. However,
   in the context of this change it was decided to postpone further
   changes.
 * Standardize auth-related configurations by using a short-form with
   the class name instead of the full qualified class name containing
   the package name.

 patch by Tiago Alves; reviewed by Mick Semb Wever, Stefan Miklosovic for CASSANDRA-19946
11 files changed