added test for version lithium

parser/parser-exciting/parser_exciting_helium.py

...ain/scala/eu/nomad_lab/parsers/ExcitingParserHelium.scala

src/test/scala/eu/nomad_lab/parsers/ExcitingParserSpec.scala

test/examples/lithium/CHGDIST.OUT

test/examples/lithium/DTOTENERGY.OUT

test/examples/lithium/EFERMI.OUT

test/examples/lithium/EIGVAL.OUT

test/examples/lithium/EQATOMS.OUT

test/examples/lithium/EVALCORE.OUT

test/examples/lithium/EVALFV.OUT

test/examples/lithium/EVALSV.OUT

test/examples/lithium/EVECFV.OUT

test/examples/lithium/EVECSV.OUT

test/examples/lithium/FERMIDOS.OUT

test/examples/lithium/GEOMETRY.OUT

test/examples/lithium/IADIST.OUT

test/examples/lithium/INFO.OUT

test/examples/lithium/KPOINTS.OUT

test/examples/lithium/LATTICE.OUT

test/examples/lithium/LINENGY.OUT