RFR: 8303133: Update ProcessTols.startProcess(...) to exit early if process exit before linePredicate is printed.

[Leonid Mesnik]

The solution proposed by Stefan K

The startProcess() might wait forever for the expected line if the process exits (failed to start). It makes sense to just fail earlier in such cases.

The fix also move
'output = new OutputAnalyzer(this.process);'
in method xrun() to be able to try to print them in waitFor is failed/interrupted.

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Commit messages:
 - 8303133: Update ProcessTols.startProcess(...) to exit early if process exit before linePredicate is printed.

Changes: https://git.openjdk.org/jdk/pull/12751/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12751&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303133
  Stats: 26 lines in 2 files changed: 16 ins; 3 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/12751.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12751/head:pull/12751

PR: https://git.openjdk.org/jdk/pull/12751