Fixed Ghost boot errors being masked

- This was a total derp on my side, wanted to change the error message, not remove the error

test/utils/e2e-framework.js

@@ -130,6 +130,7 @@ const getAdminAPIAgent = async () => {
         });
     } catch (error) {
         error.message = `Unable to create test agent. ${error.message}`;
+        throw error;
     }
 };