Update from tables to list structure in Cloud Admin Guide

Updated 'Basic Load-Balancer-as-a-Service Operations'and 'Provider extension API operations' sections to be a list instead of a table.

Partial bug: #1290447

Change-Id: I2ce247cc0893e9d499c9452ba3c9cb897beb0ed9
Merge "Update from tables to list structure in Cloud Admin Guide"