completed JUnit test of Location Within interface
clean up

- remove debug prints
- fix getUsers() logic
- fixed asserts in deleteInvalidDevice()
clean up

+ comments
+ cleaner unit cases
clean up

+ comments
+ cleaner unit cases
sensor unit tests
user knows unit tests cleanup

+ comments
- teardown
provide test suite to wrap the other junit classes
numerous fixes from JUnit development

fixed addUserKnows()
fixed addSensor()
fixed getSensors()
fixed deleteSensor()
fixed getLocationsWithin()
fixed deleteLocationWithin()
fixed broken isUserDev() logic
allLocationSensors now returns empty list (instead of 204) for locations without sensors
removed redundant checks for id validity
change to random double (to match change of Location lat/long to doubles)
updating to updated proxstorconnector api