title: Grant role to new_user is not working in 12C
body: <pre><code>DBA_USER: create role test_2
  
  DBA_user: grant create session, create any table, create any procedure to test_2;
  
  grant succeeded.....
  
  grant test_2 to new_user
  </code></pre>
  
  <p>now new_user: </p>
  
  <pre><code>create table items (item_number number(3) primary key, 
                      item_name varchar2(40), 
                      item_desp varchar2(20), 
                      item_qty number(3));
  
  Error: you have insufficient privilege 
  </code></pre>