Avoid a crash if a directory contains *_test packages

scripts/generate_db_helpers.go

@@ -81,6 +81,13 @@
 	if err != nil {
 		log.Fatal(err)
 	}
+	if len(packages) == 2 {
+		for k := range packages {
+			if strings.HasSuffix(k, "_test") {
+				delete(packages, k)
+			}
+		}
+	}
 	if len(packages) != 1 {
 		log.Fatal("Expected to find 1 go package, got: ", len(packages), packages)
 	}