Implement all aggregate fixture methods

[zambrovski]

Currently, not all aggregate fixture methods are available in the JGiven stages.
Missing are:

• given(domainEvents: List)
• givenCommands(commands: List)
• givenCurrentTime(instant: Instant)
• timeAdvancesTo(instant: Instant)
• timeElapses(duration: Duration)
• givenState(state: Supplier)
• givenState(state: () -> T)
• when(cmd: Any, metadata: Map<String, *> )
• expectEvents(events: EventMessage<*>)
• expectEventsMatching(macther: Matcher<MutableList>)
• expectNoEvents()
• expectException(class: Class)
• expectException(matcher: Matcher<*>)
• expectResultMessagePayload(payload: Any)
• expectResultMessagePayloadMatching(matcher: Matcher<*>)
• expectResultMessageMatching(matcher: Matcher<CommandResultMessage<*>>)
• expectResultMessage(command: CommandResultMessage<*>)
• expectDeadlinesMet(expected: Any)
• expectDeadlinesMetMatching(expected: Matcher<out MutableList<in DeadlineMessage<*>>>)
• expectNoScheduledDeadlines()
• expectScheduledDeadline(duration: Duration, deadline: Any)
• expectScheduledDeadlineMatching(duration: Duration, matcher: Matcher<in DeadlineMessage<*>>)
• expectScheduledDeadline(instant: Instant, deadline: Any)
• expectScheduledDeadlineMatching(instant: Instant, matcher: Matcher<in DeadlineMessage<*>>)

[zambrovski]

The methods

• timeAdvancesTo(instant: Instant)
• timeElapses(duration: Duration)
  break the fluent style of the stage... fix this.

[zambrovski]

The methods

• timeAdvancesTo(instant: Instant)
• timeElapses(duration: Duration)
  break the fluent style of the stage... fix this.

I spoke with Allard and filed an issue in their github: AxonFramework/AxonFramework#1014