use correct echo option when writing metrics file

run_tests

@@ -64,7 +64,7 @@
 # create a metrics file
 if [ "$CI" = "true" ];
 then
-    echo "odoo_scripts_tests_ran $tests_ran\nodoo_scripts_tests_failures $tests_failures\nodoo_scripts_tests_error $tests_error" > metrics
+    echo -e "odoo_scripts_tests_ran $tests_ran\nodoo_scripts_tests_failures $tests_failures\nodoo_scripts_tests_error $tests_error" > metrics
 fi
 if [ $ODOO_TYPE != 'odoo13' ];
 then