git: openjdk/mobile: 8231287: JMap should do a better job of reporting exception it catches

[duke]

Changeset: f6a5479a
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2019-09-28 12:33:34 +0000
URL:       https://github.com/openjdk/mobile/commit/f6a5479a

8231287: JMap should do a better job of reporting exception it catches

Retrhow any caught exception, and always print exceptions before exiting

Reviewed-by: sspitsyn, phh

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/JMap.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/Tool.java
! test/jdk/sun/tools/jhsdb/JShellHeapDumpTest.java