Cleaned up/unified L1Decoder configuration
In this MR a major cleanup of the L1Decoder config is performed:
- the mapping from thresholds to L1 collection names is moved from Menu to L1Decoder package tagging @fpastore
- NewJO and rece-ex-common fragments result now in the same configuration (more code sharing)
- L1DecoderTest class & instances cease to exist as we are not testing this thing any more
- the defaults are good now for all tests so setting them by hand in various tests was removed
Edited by Tomasz Bold