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.
Now it can determine, without looking at the file name, both the module
name and the configuration name (the latter with a little help from the
configuration file).
* In comparison column headers, switched the order of labels, so that
it's "to" vs "from".
* When a test was present, but not run successfully, put its status in
the corresponding cell instead of coloring it gray.
Legend for new column is:
* FASTER - strong speedup
* faster - spedup is detected but it is unreliable
* <empty> - no change in speed
* slower - slowdown is detected but it is unreliable
* SLOWER - strong slowdown
* 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