accelerate proecessing of OpenJDK crashes by adding multicore support to core dump processing routine

[Karl-Philipp Richter]

If OpenJDK crashes core dumps are somehow processed by `apport` which takes up to several minutes while only one CPU core is used 100 %. This could be improved by adding multicore support for this routine.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: apport 2.17.2-0ubuntu1.5
Uname: Linux 4.2.2-040202-generic x86_64
ApportLog:
 ERROR: apport (pid 3616) Fri Oct 2 18:01:45 2015: called for pid 3558, signal 6, core limit 0
 ERROR: apport (pid 3616) Fri Oct 2 18:01:45 2015: executable: /usr/bin/kactivitymanagerd (command line "/usr/bin/kactivitymanagerd start-daemon")
 ERROR: apport (pid 3616) Fri Oct 2 18:01:45 2015: debug: session gdbus call: (true,)

 ERROR: apport (pid 3616) Fri Oct 2 18:01:47 2015: wrote report /var/crash/_usr_bin_kactivitymanagerd.1000.crash
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Oct 2 21:29:01 2015
InstallationDate: Installed on 2015-09-14 (17 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for apport (Ubuntu) because there has been no activity for 60 days.]