Stability improvements.

* Updating library versions
* Adjusting some log message severity levels.
* Fixing "already connected" bug also seen in world model libraries.

	modified:   pom.xml
	modified:   src/main/java/com/owlplatform/solver/SolverAggregatorConnection.java
	modified:   src/main/java/com/owlplatform/solver/SolverAggregatorInterface.java