ENH: adding measurements to ConfidenceConnected

Also updated test to check them an use a seed too,

Change-Id: I1e232af0b2d2016c8543357b3bd9e7300ed91b9d
Merge topic 'SIMPLEITK-423_AddMeasurementsToConfidenceConnected' into next

4e6b4c3 ENH: adding measurements to ConfidenceConnected