Aborting builds does not kill surefire sub-process

Jenkins 1.617, master and slaves running on Centos 7. xUnit plugin 1.96 Workflow: Step API 1.8 Windows Slaves Plugin 1.1 Version Number Plug-In 1.5 Token Macro Plugin 1.10 Throttle Concurrent Builds Plug-in 1.8.4 SSH Slaves plugin 1.9 SSH Credentials Plugin 1.11 SSH Agent Plugin 1.7 SonarQube Plugin 2.2.1 Slack Notification Plugin 1.8 Script Security Plugin 1.14 SCM API Plugin 0.2 Run Condition Plugin 1.0 ruby-runtime 0.12 Rebuilder 1.24 rbenv plugin 0.0.16 promoted builds plugin 2.21 Poll SCM plugin 1.2 Plain Credentials Plugin 1.1 Parameterized Trigger plugin 2.26 PAM Authentication plugin 1.2 OWASP Markup Formatter Plugin 1.3 NodeJS Plugin 0.2.1 Node and Label parameter plugin 1.5.1 Multiple SCMs plugin 0.4 Maven Repository Server Plugin 1.2 Maven Integration plugin 2.10 Matrix Project Plugin 1.5 Matrix Authorization Strategy Plugin 1.2 MapDB API Plugin 1.0.6.0 Mailer Plugin 1.15 Log Parser Plugin 1.0.8 Libvirt Slaves plugin 1.8.5 LDAP Plugin 1.11 JUnit Plugin 1.6 jQuery UI plugin 1.0.2 jQuery plugin 1.11.2-0 Join plugin 1.15 Javadoc Plugin 1.3 Hudson Post build task 1.8 Hudson Groovy builder 1.25 Groovy Postbuild 2.2 Global Post Script Plugin 1.0.8 Gitlab Hook Plugin 1.4.0 GIT plugin 2.3.5 GIT client plugin 1.17.1 Flaky Test Handler plugin 1.0.1 External Monitor Job Type Plugin 1.4 Extended Choice Parameter Plug-In 0.44 Environment Script Plugin 1.1.2 disk-usage plugin 0.25 Dependency Graph Viewer Plugin 0.11 Custom Tools Plugin 0.4.4 Credentials Plugin 1.22 Credentials Binding Plugin 1.4 Copy Artifact Plugin 1.35.1 Config File Provider Plugin 2.8.1 conditional-buildstep 1.3.3 CloudBees Build Flow plugin 0.18 buildgraph-view 1.1.1 build timeout plugin 1.14.1 AnsiColor 0.4.1