Fix relative path to CNN in the code

[bouchamaouihichem]

TrackingDstar/LambaAnalyzer/src/LambdaAnalyzer.cc

Line 1616 in fcf07d5

tensorflow::GraphDef* graphDef = tensorflow::loadGraphDef("../ml/DeepCluster.pb");

You need to be located in /test folder to run the analyzer locally otherwise