hg: jdk/sandbox: 8242522: Minor LingeredApp improvements

[chris.hegarty at oracle.com]

Changeset: 53a457205cbe
Author:    amenkov
Date:      2020-04-29 16:02 -0700
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/53a457205cbe

8242522: Minor LingeredApp improvements
Reviewed-by: lmesnik, cjplummer

! test/hotspot/jtreg/serviceability/attach/AttachNegativePidTest.java
! test/jdk/sun/tools/jhsdb/heapconfig/TmtoolTestScenario.java
! test/jdk/sun/tools/jinfo/JInfoTest.java
! test/lib/jdk/test/lib/apps/LingeredApp.java
! test/lib/jdk/test/lib/process/OutputBuffer.java