Updated Jenkinsfile so it will run on new Eclipse CI

Signed-off-by: Jonathan Coustick <jonathan.coustick@payara.fish>
diff --git a/Jenkinsfile b/Jenkinsfile
index 4947c3e..1b6247f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -35,8 +35,6 @@
 kind: Pod
 metadata:
 spec:
-  securityContext:
-    runAsUser: 1000100000
   volumes:
     - name: maven-repo-shared-storage
       persistentVolumeClaim: