Update .gitignore to ignore .eggs
Update .gitignore to ignore .eggs

because egg* already ignores egg-info [1]

[1] https://review.openstack.org/#/c/477476/

Change-Id: Ia657ce5b65e7588a3b676c459b90c24ebc59890f

openstack/manila-ui,openstack/manila-ui,openstack/manila-ui