Fix the acronyms list
Fix the acronyms list

In addtions, add two acronyms:
1. ES: External Segment,
2. EP: External Policy

Change-Id: I4f0eb6d9f1653417eef66d9aa37822d2916d2c0e
Closes-bug: 1555450

stackforge/group-based-policy,noironetworks/group-based-policy,jiahaoliang/group-based-policy,noironetworks/group-based-policy,jiahaoliang/group-based-policy,stackforge/group-based-policy