Allow Restart of Modeshape Engine Following a Shutdown

When testing the Jopr plugin operations, I ran shutdown successfully and then ran restart and encountered the following error:

java.lang.IllegalStateException: The Repository Service has been shutdown and may not be (re)started
at org.modeshape.repository.service.AbstractServiceAdministrator.start(AbstractServiceAdministrator.java:131)
at org.modeshape.repository.ModeShapeEngine.start(ModeShapeEngine.java:287)
at org.modeshape.jcr.JcrEngine.start(JcrEngine.java:156)
at org.modeshape.jboss.managed.ManagedEngine.start(ManagedEngine.java:450)
at org.modeshape.jboss.managed.ManagedEngine.restart(ManagedEngine.java:427)