* The previous way of customizing tempest.conf was problematic
for a number of reasons:
- default values were being defined in the manifest and those
values differed from the defaults in tempest.conf.sample.
Defaults should be the province of the tempest maintainers,
not the puppet module.
- the use of templating meant that extra work would have to be
expended maintaining the templates, not only for releases
but also for the upstream master.
* This changeset switches to using ini_setting to ensure that:
- individual configuration settings can be set ad hoc, and
the upstream defaults will be left alone if no value is provided.
- tempest.conf can be sourced from the tempest repo sample rather
than having to be maintained in the module.
* Other included fixes:
- removing unused glance uri configuration
- consolidating the identity uri parameters into a single parameter,
since that is how it is represented in tempest.conf
Change-Id: Idcdf7a1002a447b7d3ae909ca9043b8d7143c313