Handle error acks

[alexander-yevsyukov]

This extends the client API with an ability to handle an error returned when posting a command or another message for asynchronous processing:

• ServerErrorHandler interface was introduced. It accepts io.spine.base.Error obtained from the server-side in an Ack.
• The Client got methods for customising error handlers
  • onStreamingError() — for handing errors obtained from gRPC.
  • onServerError() — for handling Error obtained as a part of an Ack.
    These handlers will be passed as default values for ClientRequests produced by the client.
• The ClientRequest class also got onStreamingError() and onServerError() methods for fine tuning of handlers that may be necessary for a specific request.

Other changes

• LoggingHandler interface is now more general and does not contain an association with a type. LoggingHandlerWithType is introduced for handlers that do need such an association.
• Removed redundant methods for obtaining a tenant from a signal.
• The Signal interface got the type() method which obtains the type of the enclosed message.
• Added WithTime interface for encapsulating obtaining Timestamp, Instant and time range checking.
• Added WithActor interface for encapsulating obtaining ActorContext and its properties.
• Added ContextWithActor interface which is common base for CommandContext and EventContext.
• CommandContext got a mix-in so that it's easier to obtain a user or a tenant of a command.
• Response got a mix-in for easier checking of its type.
• The internal interface MessageRejection was renamed to MessageError to avoid confusion with real rejections. It was also moved under the server package.
• The internal MessageInvalid interface was moved to the server package.

Deprecations

• @ByField was deprecated because @Subscribe.filter() which uses it was deprecated earlier.
• Command.time() was deprecated in favour of WithTime.timestamp().

[codecov]

Codecov Report

Merging #1270 into master will not change coverage.
The diff coverage is n/a.

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  Coverage     91.12%   91.12%           
  Complexity     4698     4698           
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  Files           605      605           
  Lines         14921    14921           
  Branches        852      852           
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  Hits          13597    13597           
  Misses         1058     1058           
  Partials        266      266           

[armiol]

@alexander-yevsyukov LGTM in general. Please see my comments.