Update .gitignore file.

* .gitignore: This adds the .test directory created by some config
testing commands, and also updates the egg info directory to
reflect the recent project rename.

Change-Id: Id0e4ea46bc90b37b9c427007a540e0485e640aad
Reviewed-on: https://review.openstack.org/22221
Reviewed-by: Anita Kuno <akuno@lavabit.com>
Reviewed-by: Khai Do <zaro0508@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins