Updating glance-api.conf template for grizzly

Migrated the configuration items from glance-api.conf in grizzly
to be reflected in this Chef repo.
Updating glance-api-paste.ini template for grizzly

Migrated the configuration items from glance-api.conf in grizzly
to be reflected in this Chef repo.
Updating glance-cache.conf template for grizzly

Migrated the configuration items from glance-api.conf in grizzly
to be reflected in this Chef repo.
Change keystone_register to use boolean types

keystone_register no longer accepts strings for user_enabled and
tenant_enabled.  As these have been moved to boolean types, update
calls to keystone_register here.
Update calls to glance client to use proper format

The glance client has changed such that it no longer accepts the
--silent-upload parameter and now requires that all paramaters are
prefixed by a double dash.