- rename private methods
- inline private on-shot methods
- extract common local var
- add more final modifier for vars

JSR305 is already Dormant status, so SpotBugs does not release jsr305 jar file.
Please continue using findbugs’ one.
depend on spotbugs-annotations instead.

https://spotbugs.readthedocs.io/en/stable/migration.html

- protect for NPE in method isAutoWrapper
    - add UT for getting unboxing boolean from map
- rename method/var: setAutoWrapper -> setAutoWrapperAttachment

unwrap ttl runnable for before/afterExecute methods
of executor subclass when decorate by ttl agent

- setAutoWrapper for TtlRunnable/TtlCallable
  in TtlExecutorTransformlet(Agent)
- update before/afterExecute methods of executor subclasses,
  unwrap runnable if isAutoWrapper

- expose isDisableInheritableForThreadPool/isEnableTimerTask
- improve test for DisableInheritableForThreadPool

- use CtClass.getDeclaredMethod(String, CtClass[])
  instead of CtClass.getDeclaredMethod(String)
- javadoc of CtClass.getDeclaredMethod(String):
  If there are multiple methods with the specified name,
  then this method returns one of them.