The issue with quota -v command is fixed. The problem is that the version of rpc.rquotad that ships with Ubuntu 15.04 is broken. I removed it and installed the version from 14.10 and it worked, except that 14.10 isn’t systemd based and so the start-up scripts didn’t work. But I saved the binary from that package, removed the package, re-installed the 15.04 package, and then substituted the rpc.rquotad program from the 14.10 package but using the start-up scripts from 15.04 and now it’s all working again.
Sorry these upgrades have been so disruptive. This was not my intent but it is a learning curve going from Centos 6 to Ubuntu 15.04. It’s worth the effort I think in terms of performance and capabilities but a pain in the rear.