admin update the coach position of sc-gnt intercity express
it has two rakes
one rake compostion is
ENG-SLR-GEN-GEN-C1-D1-D2-D3-D4-D5-D6-D7-D8-GEN-GEN-GEN-GEN-GEN-SLR
another rake composition is ENG-SLR-GEN-D1-C1-D2-D3-D4-D5-D6-D7-D8-GEN-GEN-GEN-GEN-GEN-GEN-SLR