RFR: 8265465: jcmd VM.cds should keep already dumped archive when exceptions happens [v4]

[Yumin Qi]

> Hi, Please review 
>   When using jcmd to dump shared archive, if the archive name exists,  it will be deleted first. If exception happens during dumping process, there is no new archive created. This PR changes to first dump the archive with  a temporary file name. With successful dump, the temporary file will be rename to its given name. This way the old archive will not be touched on exception.
>   The newly added test case skipped testing on Windows since File operation result is not same as on Linux.
>   
>    Tests: tier1,tier2,tier3,tier4
> 
> Thanks
> Yumin

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

  Removed using temporary file in test case

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3886/files
  - new: https://git.openjdk.java.net/jdk/pull/3886/files/83478dd1..e3363915

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3886&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3886&range=02-03

  Stats: 17 lines in 1 file changed: 2 ins; 10 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3886.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3886/head:pull/3886

PR: https://git.openjdk.java.net/jdk/pull/3886