Changed java tests detection procedure
Fixed android test detection and some spaces in CMakeLists.txt
Fix xfeatures2d dependencies
Merge pull request #3237 from mshabunin:java_test_detection
Neon optimization of cv::sum
Merge pull request #3239 from mshabunin:xfeatures2d_fix
Merge pull request #3248 from ilya-lavrenov:arm_sum