Add release date for v2.5.0 to changelog (#40321)
Add release date for v2.5.0 to changelog (#40321)

According to https://github.com/ansible/ansible/blob/stable-2.5/changelogs/CHANGELOG-v2.5.rst#v250
Ansible 2.5.0 was released on 2018-03-22.

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>
thaim/ansible,thaim/ansible