ods-enforcer ds-X commands no longer work. ods-enforcer key export command no longer works

It seems some bugs were introduced in the refactor of the command handling that is already in 2.0. I found that rollover list always reported 'unknown arguements' no matter what was typed. This was because the command wasn't being processed. I have fixed this in pull request #55 but decided to test the other commands. I tried a few and found that all the ds-X commands and key export seem to have the same problem. So these need fixing and I guess the rest could do with checking too!

I guess one reason this wasn't noticed is that we don't have any regression tests turned on that use these commands....