Add Mobilenet2SSDLite test

The new test works both with TensorRT and cuDNN. Preprocessing and
Postprocessing are missing. Add ClippedReLU (for ReLU6), groups for
Conv2d, additional bias for convolution.

Other minors:
-move the timer in the detector to measure all the
processing time for a given frame (both centernet and yolo);
-add int8 flag.

Signed-off-by: Micaela Verucchi <micaelaverucchi@gmail.com>
Davide Sapienza <sapienza.dav@gmail.com>

src/Activation.cpp

@@ -5,10 +5,11 @@
 
 namespace tk { namespace dnn {
 
-Activation::Activation(Network *net, int act_mode) : 
+Activation::Activation(Network *net, int act_mode, const float ceiling) : 
     Layer(net) {
 
     this->act_mode = act_mode;
+    this->ceiling = ceiling;
     checkCuda( cudaMalloc(&dstData, input_dim.tot()*sizeof(dnnType)) );
 
     if(int(act_mode) < 100) {
@@ -31,7 +32,7 @@ Activation::Activation(Network *net, int act_mode) :
         checkCUDNN( cudnnSetActivationDescriptor(activDesc,
                                                 (cudnnActivationMode_t) act_mode,
                                                 CUDNN_PROPAGATE_NAN,
-                                                0.0) );
+                                                ceiling) );
     }
 }