Bump NFS Ganesha version
Bump NFS Ganesha version

We are using NFS Ganesha 2.7 which is not longer supported
by the Ganesha community. Let's use v3.0 instead.

Closes-Bug: #1898952
Change-Id: I69543fd33c98817bba76c6712ae91264c532c12c

openstack/devstack-plugin-ceph