Hides tests results when a new classifier is trained
Hides tests results when a new classifier is trained

from https://github.ibm.com/Watson/developer-experience/issues/179  when
a new classifier is trained the old test results were not hidden.  Now
they are hidden.

watson-developer-cloud/visual-recognition-nodejs,oremari/plantDiseaseSymptoms-vr-demo-1483744992341,oremari/plantDiseaseSymptoms-vr-demo-1483744992341,watson-developer-cloud/visual-recognition-nodejs