replace expression to contains
WELD-1802 moved clearing of bean store and clean up to finally clause
WELD-1802 destroying conversation if an exception occurs when attaching bean store
WELD-1774 Fix conversation context activation/association

- do not throw an exception when the conversation context is already
active (just log a warning that it's most likely a ThreadLocal leak)
- always associate the conversation context with the current HTTP
request
WELD-1787 Preparation work
WELD-1787 Cache resolved observers within EventImpl
WELD-1787 Cache EventMetadata within EventImpl
WELD-1787 Make code more reusable
WELD-1787 Make it possible for a TypeSafeResolver to return a different type after finalizing
WELD-1787 Cache ResolvedObservers
WELD-1787 Get rid of EventPacket
WELD-1787 Cache whether event metadata is required by any of the observers
WELD-1787 Minor
WELD-1787 Resolvables - remove unused methods
WELD-1787 Resolvables - more cleanup
WELD-1787 Resolvables - addQualifierUnchecked
WELD-1787 Resolvables - simplify ResolvableBuilder
WELD-1787 QualifierInstance - fast track for Default and Any
WELD-1787 QualifierInstance - only keep the name of the method
WELD-1787 QualifierInstance - nicer hashcode