Add documentation for Ceilometer

Closes-Bug: #1216716
Change-Id: I2c4d9eefb6fe6d1629623708e17939207f3a1c10
Update pom.xml to 1.11.1 clouddocs-mvn-plugin

Change-Id: Ib4eda19ad6e698d7ff06fec39f50ceeec486c8cc
author: diane fleming