refactor(frontend): fails loudly to help debug gms issue (datahub-project#1626)

This will print the full stacktrace in log to help identify various gms issues

Author: mars-lan

datahub-frontend/app/controllers/api/v1/User.java

@@ -17,7 +17,6 @@
 import utils.ControllerUtil;
 
 import javax.annotation.Nonnull;
-import java.security.InvalidParameterException;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -49,7 +48,7 @@ public Result getLoggedInUser() {
     try {
       corpUser = _corpUserViewDao.getByUserName(username);
     } catch (Exception e) {
-      throw new InvalidParameterException("Invalid username: " + username);
+      throw new RuntimeException(e);
     }
 
     if (corpUser == null || !corpUser.getUsername().equals(username)