updated tests and test data for photo

modules/xphoto/test/dct_image_denoising.cpp

@@ -4,7 +4,8 @@ namespace cvtest
 {
     TEST(xphoto_dctimagedenoising, regression)
     {
-        cv::String dir = cvtest::TS::ptr()->get_data_path() + "dct_image_denoising/";
+        cv::String subfolder = "cv/xphoto/";
+        cv::String dir = cvtest::TS::ptr()->get_data_path() + subfolder + "dct_image_denoising/";
         int nTests = 1;
 
         double thresholds[] = {0.2};

modules/xphoto/test/simple_color_balance.cpp

@@ -4,7 +4,8 @@ namespace cvtest
 {
     TEST(xphoto_simplecolorbalance, regression)
     {
-        cv::String dir = cvtest::TS::ptr()->get_data_path() + "simple_white_balance/";
+        cv::String subfolder = "cv/xphoto/";
+        cv::String dir = cvtest::TS::ptr()->get_data_path() + subfolder + "simple_white_balance/";
         int nTests = 12;
         float threshold = 0.005f;
 

modules/xphoto/test/test_main.cpp

@@ -1,3 +1,3 @@
 #include "test_precomp.hpp"
 
-CV_TEST_MAIN("xphoto")
+CV_TEST_MAIN("")