RFR: 8267075: jcmd VM.cds should print directory of the output files [v2]

[Yumin Qi]

> Hi, Please review the simple change for jcmd VM.cds to print directory of output file.
> The printout will print out absolute file path, also a test scenario added.
> 
> Tests: tier1,tier2,tier3,tier4
> 
> Thanks
> Yumin

Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:

  Fix string name for prompt

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4576/files
  - new: https://git.openjdk.java.net/jdk/pull/4576/files/e78f7043..2ef28e06

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4576&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4576&range=00-01

  Stats: 8 lines in 1 file changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4576.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4576/head:pull/4576

PR: https://git.openjdk.java.net/jdk/pull/4576