When we have similar matrices in input, then algorithm returns matrices
with NaN values.

- fixed lena.png extension
- fixed getTextSize wrapper
- added junit html report generation

- disabled xfeature2d dependency for java wrappers
- fixed java wrappers build after cmake rerun
- disabled opencv_ml tests temporarily
- fixed Imgproc usage in java tests

underline

sss

Added workaround for Nvidia: take into account that 3-channel vector type takes 4*elem_size in local memory.