RFR: 8261131: jcmd jmap dump should not accept gz option with no value [v3]

[Lin Zang]

> 8261131: jcmd jmap dump should not accept gz option with no value

Lin Zang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into gz-fix
 - remove useless code and update copyright
 - 8261131: jcmd jmap dump should not accept gz option with no value

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2399/files
  - new: https://git.openjdk.java.net/jdk/pull/2399/files/620423ef..ecf05fea

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2399&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2399&range=01-02

  Stats: 12401 lines in 445 files changed: 8062 ins; 3151 del; 1188 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2399.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2399/head:pull/2399

PR: https://git.openjdk.java.net/jdk/pull/2399