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.