ANALYSIS:
=========
Issue here is, a user who doesn't have access to certain
tables is able to obtain information about those tables
through the Information_schema.

The issue occurred because of missing table level privilege
checks when accessing table information from Information
schema tables.

FIX:
====
Added a check to verify table level privileges for the user
when accessing table information from Information_Schema
tables.

Change-Id: Ic31983598905aa6779334059fc263019041396aa