Update the settings file
Update the settings file

The settings file is now able to read environment variables to set up the tests.

barseghyanartur/djorm-ext-pgfulltext,asmedeus/djorm-ext-pgfulltext,gsong/djorm-ext-pgfulltext,linuxlewis/djorm-ext-pgfulltext,megahall/djorm-ext-pgfulltext,pombredanne/djorm-ext-pgfulltext