Fix use of "style_version" with GET (inline styles)

It took a lot of time to produce a testcase for this as the test
config was setting srid to 4326 but not changing geom column name
thus all tiles fetched by tests returned blank (ouch!)

config/environments/test.js.example

@@ -10,7 +10,6 @@ var config = {
         user: "publicuser",
         host: '127.0.0.1',
         port: 5432,
-        srid: 4326,
         extent: "-20005048.4188,-20005048.4188,20005048.4188,20005048.4188",
         simplify: true
     }