8177728: [TESTBUG] Improve CDS test utils Summary: Improved and expanded CDS test utils; updated CDS tests to use new utils. Reviewed-by: jiangli, ccheung

Merge

8176472: Lazily create ModuleEntryTable Summary: Moved the unnamed module out of the ModuleEntryTable and into the ClassLoaderData so that the MET can be lazily created only when other modules are present. Also a smaller PackageTable size. Reviewed-by: gtriantafill, hseigel, lfoltan, coleenp

8176580: [ppc, s390] CRC32C: wrong checksum result in some cases Reviewed-by: simonis, mdoerr Contributed-by: lutz.schmidt@sap.com

8178727: CTW should provide class names in error messages Reviewed-by: kvn

8169517: WhiteBox should provide concurrent GC phase control Summary: Added WhiteBox API and G1 implementation. Reviewed-by: shade, dfazunen

8178291: Add CTW test for boot module Reviewed-by: kvn

8178336: Unnecessary SystemDictionary walk for Protection domain liveness Summary: remove system dictionary walk and pass strong closure for !ClassUnloading Reviewed-by: jiangli, iklam

8150388: Remove SPARC 32-bit support Reviewed-by: hseigel, coleenp, dholmes, kvn

8026985: Rewrite SystemDictionary::classes_do and Dictionary::classes_do to use KlassClosure Summary: Actually remove unused functions like classes_do and methods_do. Reviewed-by: iveresov, sspitsyn, dholmes

8178363: Incorrect check for nmethod re-registration in C1 Reviewed-by: stefank, rbackman

8160748: Inconsistent types for ideal_reg Summary: Made ideal_reg consistently uint. Reviewed-by: kvn, iveresov

8178364: Command-line flags of type double should accept integer values Reviewed-by: dholmes, sjohanss

Merge