Direction splitter > check for already split-ed trips

[mmathieum]

Tasks:

• [ ] new direction ID assignment different if split-ed by trip head-sign
• [ ] check Orleans Express Montreal Airport route

Check:

• [x] https://github.com/mtransitapps/ca-kingston-transit-bus-android/compare/11e40b5e26bf05194af33cd503f4c5f25ae82da4...2fece5b15d0f19d209189be07a0c051fdfc0de18
• [x] https://github.com/mtransitapps/ca-campbell-river-transit-system-bus-android/compare/19e14a1b8cdb5810144e667bb699f6f3c7595650...5611f4423157423011ffd2a460e09780964f5bc7

[mmathieum]

https://github.com/mtransitapps/parser/commit/9a35c1e0cdba88c5bf4b95c9d172a20c96bcc654

https://github.com/mtransitapps/parser/commit/b9cdcaa72da19e3bacc9e51b32e9e6dd06be8a77

https://github.com/mtransitapps/parser/commit/c4930fc96c48064485b8dd0257d90105638fb157

https://github.com/mtransitapps/parser/commit/2c31e4a235780f6445199eea49d60089f93e17c0