RFR: 8306946: jdk/test/lib/process/ProcessToolsStartProcessTest.java fails with "wrong number of lines in OutputAnalyzer output" [v4]

[Leonid Mesnik]

> The ProcessTools.startProcess (...) has been updated to completely read streams after process has been completed.
> The test was updated to run 5 times with different number of lines and line sizes.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  catching Cancellation exception

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13683/files
  - new: https://git.openjdk.org/jdk/pull/13683/files/d02b889a..8f350c8f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13683&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13683&range=02-03

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13683.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13683/head:pull/13683

PR: https://git.openjdk.org/jdk/pull/13683