General improvements on variable isolation and other issues

...ojects/defaultProject/models/connectivityModels/QUDG.java

...s/defaultProject/models/connectivityModels/StaticUDG.java

...rojects/defaultProject/models/connectivityModels/UDG.java

...ects/defaultProject/models/distributionModels/Circle.java

...ects/defaultProject/models/distributionModels/Grid2D.java

...ects/defaultProject/models/distributionModels/Line2D.java

...efaultProject/models/distributionModels/PositionFile.java

...ects/defaultProject/models/distributionModels/Random.java

...aultProject/models/interferenceModels/NoInterference.java

...ojects/defaultProject/models/interferenceModels/SINR.java

...roject/models/messageTransmissionModels/ConstantTime.java

...tProject/models/messageTransmissionModels/RandomTime.java

...ects/defaultProject/models/mobilityModels/NoMobility.java

...ects/defaultProject/models/mobilityModels/PerfectRWP.java

...defaultProject/models/mobilityModels/RandomDirection.java

.../defaultProject/models/mobilityModels/RandomWayPoint.java

...efaultProject/models/reliabilityModels/LossyDelivery.java

...java/projects/defaultProject/nodes/edges/BooleanEdge.java

...jects/defaultProject/nodes/timers/DirectMessageTimer.java

...va/projects/defaultProject/nodes/timers/MessageTimer.java