RANGER-5392: Policies created by grant command have empty 'created by…

[Sanket-Shelar]

…' and 'updated by' fields

What changes were proposed in this pull request?

When grant policy is created created by and updated by is empty as it is trying to get the details from ContextUtil.getCurrentUserId() method which in case of non kerbores environment is giving null.
Update the condition to fetch user from database.

How was this patch tested?

Local build.
Ran grant command for a table and policy is created with created by and updated by field populated.

[mneethiraj]

ContextUtil.getCurrentUserId() would not be null in Kerberos environments; in this case, avoid unnecessary calls to DB to retrieve XPortalUser. Consider the following:

  if (!populateExistingBaseFields) {
    Long addedByUserId = ContextUtil.getCurrentUserId();

    if (addedByUserId == null) {
      XXPortalUser createdByUser = daoMgr.getXXPortalUser().findByLoginId(vObj.getCreatedBy());

      if (createdByUser != null) {
        addedByUserId = createdByUser.getId();
      }
    }

    entityObj.setCreateTime(DateUtil.getUTCDate());
    entityObj.setUpdateTime(entityObj.getCreateTime());
    entityObj.setAddedByUserId(addedByUserId);
    entityObj.setUpdatedByUserId(entityObj.getAddedByUserId());
  } else {
    ...
  }