Introduces The Guru Meditation Report

Introduces the classes for the actual Guru Meditation Report,
and utilities for creating a hook to autorun it on SIGUSR1.
The Text version is introduced in this commit; it is called
TextGuruMeditation.  This is the last of the Guru Meditation
Report/Openstack Common Reporting Framework commits.

Change-Id: I89cf868c0b515b6caf20987bfa2d6b73c860672a
Implements: bp guru-meditation-report
Merge "Introduces The Guru Meditation Report"