meta 2.0 changes, removing will/did parse messages

parser/parser-exciting/exciting_parser_bandstructure.py

parser/parser-exciting/exciting_parser_dos.py

parser/parser-exciting/exciting_parser_gs_input.py

parser/parser-exciting/exciting_parser_gw_input.py

parser/parser-exciting/exciting_parser_xs_input.py

parser/parser-exciting/parser_exciting.py

parser/parser-exciting/parser_exciting_lithium.py

src/main/scala/eu/nomad_lab/parsers/ExcitingParser.scala

...in/scala/eu/nomad_lab/parsers/ExcitingParserLithium.scala