Apparently, JDK-8314909 made jdk:tier2 run for much longer:
 Before: ~3300s
 After: ~4500s

This adds 20 minutes to 1 hour test suite.

Worst offenders are:

% cat times-jdk-tier2.log | grep jpackage | cut -d" " -f 3,4 | sort -n | tail -n 10
91173 tools/jpackage/share/RuntimePackageTest.java#id0
91872 tools/jpackage/linux/AppAboutUrlTest.java#id0
104116 tools/jpackage/share/ServiceTest.java
115853 tools/jpackage/share/AddLauncherTest.java#id1
121385 tools/jpackage/share/jdk/jpackage/tests/AppVersionTest.java
125082 tools/jpackage/linux/PackageDepsTest.java
177424 tools/jpackage/share/MultiNameTwoPhaseTest.java
201085 tools/jpackage/share/jdk/jpackage/tests/MainClassTest.java
207824 tools/jpackage/linux/jdk/jpackage/tests/UsrTreeTest.java
225124 tools/jpackage/share/jdk/jpackage/tests/BasicTest.java