8217660: Refactor module related locked_create_entry_or_null() functions Summary: Remove function return values and add functions that create entries without doing unneeded lookups. Reviewed-by: redestad, lfoltan

8217518: Crypto benchmarks not warming up in time Summary: Adding +AlwaysPreTouch to crypto benchmarks to allow GC to warm up Reviewed-by: redestad

8216136: Take Compile_lock for SystemDictionary::_modification_counter with safepoint check Summary: Transition compiler thread from native to VM state to check the Compile_lock with safepoint always. Reviewed-by: dlong, eosterlund, dholmes

8217716: Remove dead code in PhaseChaitin Reviewed-by: thartmann

8217264: HttpClient: Blocking operations in mapper function do not work as documented Summary: ensures that a new task is spawned when calling getBody() on a mapping BodySubscriber. Reviewed-by: chegar

8217638: Remove old way of running tests (test/Makefile) Reviewed-by: erikj, jjg

8217626: Add setup/teardown functionality to RunTest Reviewed-by: erikj, shurailine

8217634: RunTest documentation and usability update Reviewed-by: erikj

8213231: ThreadSnapshot::_threadObj can become stale Reviewed-by: dcubed, dholmes, rehn

8210583: Base64.Encoder incorrectly throws NegativeArraySizeException Reviewed-by: rriggs, naoto, darcy, alanb

8194860: Cleanup Semaphore timed-wait time calculations Reviewed-by: coleenp, kbarrett

8217613: [AOT] TEST_OPTS_AOT_MODULES doesn't work on mac Reviewed-by: tbell, kvn, iignatyev

Added tag jdk-13+5 for changeset e3ed96060992

8217366: ZoneStrings are not populated for all the Locales Reviewed-by: rriggs

Merge

8217359: C2 compiler triggers SIGSEGV after transformation in ConvI2LNode::Ideal Reviewed-by: thartmann Contributed-by: jitao8@huawei.com