Integrate OSProfiler

Registered by Illia Khudoshyn

OSprofiler allows us to trace request. So we can have a osprofiler
context that will turn on/off profling. And during cleanup collect all traces
from ceilometer or other backend and store to rally DB. After that extend
rally task report to display traces as well.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Illia Khudoshyn
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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