Fixing 2 issues for trsp

[cvvergara]

Fixes #1929 and #2057 .

Changes proposed in this pull request:

• Making compilation faster include/c_types/trsp/trsp.h #1929
  • fix for trsp/trsp.h
  • using Edge_t
• trspViaEdges columns in different order and improvements #2057 improvements:
  • using edges_input
  • using pgr_SPI_connect and pgr_SPI_finish
  • using pgr_get_edges to fetch the edges
  • improvements on pgtap tests
• trspViaEdges columns in different order and improvements #2057 Bug fix
  • fixes columns order of inner query problem
• removing no longer used code

@pgRouting/admins

[cvvergara]

I think I still need to update the NEWS and release notes as this fixes a bug