Fix Crema and instrument definition to support ESA Rosetta mission

For Rosetta the mission metakernel filenames are in uppercase and not found by the tool:

>>> EsaCremasCollection('Rosetta')
<RosettaCremaCollection> Latest version: v340_20220107_001 | No metakernel is available.

where these mk are actually available:

<RosettaCremaCollection> Latest version: v340_20220107_001 | 2 metakernels are available:
 - ROS_OPS_V340_20220107_001.TM
 - ROS_OPS.TM

Edited Mar 30, 2022 by benoit seignovert