Replace qualified "sqlite_schema" refs with old names.
Replace qualified "sqlite_schema" refs with old names.

The new qualified names don't work in SQLite 3.14.2 (the version
that shipped with Python 3.6.0). The new and old names are shown
below:

  ==================  ==================
  New Name            Old Name
  ==================  ==================
  main.sqlite_schema  sqlite_master
  temp.sqlite_schema  sqlite_temp_master
  ==================  ==================

shawnbrown/gpn,shawnbrown/gpn