Hibernate Transaction being committed twice

The Hibernate transaction started in IngestAreaScannerWorker:158 has
been committed twice. Once within the method insertJobIntoQueue and
once after the call of this method. This resulted in the following
error:
```
2014-04-18 12:28:10,877 [taskScheduler-3] ERROR
d.u.h.d.c.IngestAreaScannerWorker - Caught:
org.hibernate.TransactionException: Transaction not successfully started
org.hibernate.TransactionException: Transaction not successfully started
at
org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:13
1) ~[ContentBroker.jar:na]
at
de.uzk.hki.da.core.IngestAreaScannerWorker.scheduleTask(IngestAreaScanne
rWorker.java:166) ~[ContentBroker.jar:na]
at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
~[na:na]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25) ~[na:1.6.0_26]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_26]
at
org.springframework.scheduling.support.ScheduledMethodRunnable.run(Sched
uledMethodRunnable.java:65) [ContentBroker.jar:na]
at
org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.r
un(DelegatingErrorHandlingRunnable.java:54) [ContentBroker.jar:na]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
[na:1.6.0_26]
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:31
7) [na:1.6.0_26]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
[na:1.6.0_26]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.acc
ess$101(ScheduledThreadPoolExecutor.java:98) [na:1.6.0_26]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run
Periodic(ScheduledThreadPoolExecutor.java:180) [na:1.6.0_26]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run
(ScheduledThreadPoolExecutor.java:204) [na:1.6.0_26]
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecuto
r.java:886) [na:1.6.0_26]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
va:908) [na:1.6.0_26]
at java.lang.Thread.run(Thread.java:662) [na:1.6.0_26]
```
Merged latest changes
Merge branch 'master' of https://github.com/StephanU/DNSCore