some pmd fixes

...ava/teetime/framework/A2InvalidThreadAssignmentCheck.java

src/main/java/teetime/framework/AbstractCompositeStage.java

src/main/java/teetime/framework/AbstractPort.java

src/main/java/teetime/framework/ConfigurationContext.java

src/main/java/teetime/framework/ExecutionException.java

src/main/java/teetime/framework/ExecutionInstantiation.java

src/main/java/teetime/framework/IntraStageCollector.java

src/main/java/teetime/framework/MonitoringThread.java

src/main/java/teetime/framework/OutputPort.java

src/main/java/teetime/framework/ThreadService.java