Summary: Copied CDS tests from jdk-9 to jdk8u40
Reviewed-by: ccheung, dholmes

Summary: Use @ignore to exclude failing tests
Reviewed-by: coleenp, ctornqvi, mseledtsov
Contributed-by: george.triantafillou@oracle.com

Summary: Make sure CDS is off by default when running server compiler.
Reviewed-by: dholmes, coleenp

8023381: VM fails to initialize in runtime/CDSCompressedKPtrs/XShareAuto.java runtime/SharedArchiveFile/CdsSameObjectAlignment.java
Summary: Improve handling when CDS archive cannot be mapped
Reviewed-by: kvn, dholmes, mseledtsov

8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank

Summary: Wrote tests for use of CDS with ObjectAlignmentInBytes CL option
Reviewed-by: coleenp, ctornqvi, hseigel
Contributed-by: NMikhailo Seledtsov <mikhailo.seledtsov@oracle.com>