Summary:
- Replace null with root() to represent root container for consistency
- Support rcm inheritance by Thread.inheritedResourceContainer

Test Plan: jtreg com/alibaba/rcm/ multi-tenent/

Reviewed-by: luchsh, tanghaoth90

Issue: https://github.com/alibaba/dragonwell8/issues/95

Summary:
Introduce ResourceContainer to manage resources.
ResourceContainer defines a set of resource Constraint
that limit resource usage by threads.

Test Plan: jtreg com/alibaba/rcm

Reviewed-by: luchsh, sanhong

Issue: alibaba/dragonwell8#87

Reviewed-by: alanb, dholmes, mr, plevart, psandoz

Reviewed-by: jfranck
Contributed-by: andreas.lundblad@oracle.com, peter.levart@gmail.com

Reviewed-by: dholmes, jfranck

Reviewed-by: ahgross, mchung, xuelei

Reviewed-by: martin, alanb, chegar, plevart

8004919: AnnotationSupport uses possibly half-constructed AnnotationType instances
Summary: Implements the simplified semantics for repeating annotations and removes the incorrect obtaining of an AnnotationType
Reviewed-by: darcy, abuckley

Reviewed-by: darcy

Reviewed-by: darcy

Reviewed-by: chegar, ksrini

Reviewed-by: lancea, chegar, smarks

Reviewed-by: darcy, weijun

6511515: poor performance of LogRecord.inferCaller depending on java.lang.Throwable.getStackTraceElement
Summary: Allow random access to stack trace elements; retrieve only needed ones
Reviewed-by: swamyv
Contributed-by: jeremymanson@google.com

Summary: allow shutdown hook to be added during shutdown and handle properly if it fails to add
Reviewed-by: alanb, dholmes, martin

Summary: Register the shutdown hooks only when needed and remove JavaIODeleteOnExitAccess
Reviewed-by: alanb