S2-MSI reader: many fixes and improvements, including
- Big S2 datasets could lead to "Too many file opened" exceptions.
- Angles grid now strictly fit to image in terms of size.
- The S2 and JP2 readers were not usable in a headless environment.
- Fixed description and units for S2 bands
- Resource leaks detected by Coverity (https://scan.coverity.com/) fixed
- Better validation of Angles Grid data
- Color rendering of L2A Scene Classification now fits with PDD & ATBD