RFR: 8277481: Obsolete seldom used CDS flags

[Harold Seigel]

Please review this change to obsolete deprecated CDS options UseSharedSpaces, RequireSharedSpaces, DynamicDumpSharedSpaces, and DumpSharedSpaces.  The change was tested by running Mach5 tiers 1-2 on Linux, Mac OS, and Windows and Mach5 tiers 3-5 on Linux x64 and Windows x64.

The use of UseSharedSpaces in ps_core_common.c was tested on Mac OS x64 by temporarily removing serviceability/sa/ClhsdbPmap.java#core from the problem list.

Thanks! Harold

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Commit messages:
 - fix typo
 - 8277481: Obsolete seldom used CDS flags

Changes: https://git.openjdk.java.net/jdk/pull/6800/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6800&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277481
  Stats: 151 lines in 13 files changed: 22 ins; 94 del; 35 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6800.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6800/head:pull/6800

PR: https://git.openjdk.java.net/jdk/pull/6800