Updated from global requirements

Change-Id: I38fd12afe0ff6b62b21d7374642a65db0deafdc1
Add endpoint opt into auth_plugin

Endpoint should be present in auth_plugin options to allow
connect to ceilometer through specified endpoint and token

Closes-Bug: #1354507
Change-Id: I0aaafc6f599a67b242ade25efb3e667738bd71fd
Replace assertTrue with assertIsNotNone for check an object

assertTrue(*) means to check whether a boolean value/expression
is true or not. For checking an object is not None, we should use
assertIsNotNone(*), which gives more explicit expression.

Change-Id: Ia4d0dcec81e97fe4774bff4e41a017f00b899ef3
Closes-Bug: #1297156
Merge "Updated from global requirements"
Merge "Replace assertTrue with assertIsNotNone for check an object"