Integrate OSprofiler and Cinder

*) Add osprofiler wsgi middleware
This middleware is used for 2 things:
1) It checks that person who want to trace is trusted and knows
secret HMAC key.
2) It start tracing in case of proper trace headers
and add first wsgi trace point, with info about HTTP request
*) Add initialization of osprofiler at start of serivce
Set's olso.messaging notifer instance (to send notifications to Ceilometer)

*) Fix fake notifier

Change-Id: Ic3ce587946eaa7e6b19cf35a2cc905ae5de29dd3