Create telemetry-specs git repo

This will serve as a repository of approved blueprint
specifications for the Telemetry program, from Juno
onwards.

The gerrit review workflow for this repo will act as
the blueprint oversight and approval process for the
project.

Once landed, the approved version of a blueprint spec
is linked to the corresponding launchpad blueprint via
the specification URL being set in launchpad to a link
of the following form:

  http://git.openstack.org/cgit/openstack/telemetry-specs/tree/specs/juno/${BLUEPRINT_NAME}.rst

Note that the above example URL is not intended as a real
link to be actually clicked upon by readers of this commit
message.  Rather, the actual blueprint name is substituted
for the ${BLUEPRINT_NAME} parameter.

Change-Id: I8a31a16dab6e16ed4b14558c6b00ff03b2f84132
Merge "Create telemetry-specs git repo"