[NETWORKS] update YOLOv3 and add YOLOv3-tiny

yolov3.optimized.onnx → yolov3-tiny.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:abba786811991f838b885d7e9d060ca42cbc1f20bdac58634e182cf6f17c0bb6
-size 247740299
+oid sha256:ea95c075c7e23983e201c8fcea1a29d949a225becaaa2891a7b0502b5ddb0379
+size 35450655

yolov3.pb → yolov3.onnx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:21fad8ab6653e077c568a254763b1cdc90dd9400990d5d5f1db3a373b7d05549
-size 247763904
+oid sha256:a74caee41dcdc58b2da4338ff781c2298019ae3554814ae4e237115f8c701727
+size 247918549