Ensure That JNA lib Can Work On Hardened Host

[ferricoxide]

Problem Description:

When deploying on a fully-hardened system, Jenkins jobs that rely on JNA lib may fail

Expected Behavior:

Jobs reliant on JNA lib function

Actual Behavior:

Jobs reliant on JNA lib may fail with errors similar to:

18:10:02.095 [ERROR] [system.err] Caused by: java.lang.UnsatisfiedLinkError: 
  /tmp/libjunixsocket-native-2.0.47627608075125696391.so: 
  /tmp/libjunixsocket-native-2.0.47627608075125696391.so: failed to map segment
  from shared object: Operation not permitted

Fix recommendation:

Ensure that that JVM starts with:

-Djava.io.tmpdir=${JENKINS_HOME}/tmp

(or similar) via an appropriate JENKINS_JAVA_OPTIONS setting in the /etc/sysconfig/jenkins file.

See CloudBess Support #215281717