webapps.mason.backend.tests: change db filename to mason-test.db to

avoid interference from other tests

extra/webapps/mason/backend/backend-tests.factor

@@ -2,12 +2,12 @@ USING: continuations db db.sqlite io.directories io.files.temp
 webapps.mason.backend tools.test ;
 IN: webapps.mason.backend.tests
 
-[ "test.db" temp-file delete-file ] ignore-errors
+[ "mason-test.db" temp-file delete-file ] ignore-errors
 
 [ 0 1 2 ] [
     ! Do it in a with-transaction to simulate semantics of
     ! with-mason-db
-    "test.db" temp-file <sqlite-db> [
+    "mason-test.db" temp-file <sqlite-db> [
         [
             init-mason-db