--help message and starting run.py w/o parameters generate different messages
E. g. w/ and w/o build_path in the end
build_path is required, removing square brackets
Some of functions were enabled on Qualcomm S800 by changing grid size;
OpenCL kernel grid size unification for different platfroms;
Test pass rate improvements by inclreasing threshold;
Some tests were disabled for Android;
run.py was adopted for devices with brackets in in name.
Previously, run.py would assume that the opencv_java library is in the
same directory as the tests, which is only true on Windows.
The library path depends on the build configuration, which may not be
known until the actual build (e.g. with the Visual Studio generators),
so it can't be stored in the CMake cache for run.py to read. I didn't
want to hardcode into run.py where the library is on each platform,
either. So that's why I used the current scheme with the properties
file. It also makes running the tests without run.py a little easier.
* use OPENCV_TEMP_PATH environment variable on all platforms
* fix cleanup after OpenCV tests on Windows
* add --list flag to output names of all tests found
* do not override user-passed --perf_min_samples and --perf_force_samples
options by --check flag
* fix complier checks inside run.py
* do not lose auto-selected device while running several tests
* reduce output noise
* list available devices if unable to auto-select device
* fix error message when no devices connected
