Add strategy for customizing ID/TIMESTAMP headers

Introduce MessageHeaderInitializer strategy for initializing a
MessageHeaderAccessor.

Add IdTimestampMessageHeaderInitializer implementation that provides
control over ID and timestamp header generation.

Disable ID and timestamp by default in SimpMessageHeaderAccessor and
therefore its sub-class StompHeaderAccessor.

Issue: SPR-11468
Use strategy for customizing ID/TIMESTAMP generation

Issue: SPR-11468
Fix expression cache

Prior to this commit, only the java.lang.reflect.Method was used to
identify an annotated method. As a result, if different annotations
were placed on different methods (method overriding, interface
implementation) only the first one (cached) was used.

LazyParamAwareEvaluationContext was affected by the exact
same problem and has been also fixed.

Issue: SPR-11692