RFR: CODETOOLS-7902858: jcstress: Clean up progress message [v2]

[Aleksey Shipilev]

> Current progress message seems overloaded. Printing the number of tests and forks is misleading after multiple forks and multiple VMs are run per test. We can simplify the implementation considerably.

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Fix build error

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Changes:
  - all: https://git.openjdk.java.net/jcstress/pull/17/files
  - new: https://git.openjdk.java.net/jcstress/pull/17/files/650e34d2..0a9eea97

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jcstress&pr=17&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jcstress&pr=17&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/17.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/17/head:pull/17

PR: https://git.openjdk.java.net/jcstress/pull/17