Replace more then just "-" in REPONAME

Looks like shells only support alphanumeric characters and "_"'s in
environment variables. We were substituting "-" characters but in
order to be able to set overrides in projects with names containing
other characters we need to substitute more, I'm looking at you
oslo.config.

Change-Id: I3e2b1b0bc5871e4ec4ffd8117906cd077aa2cb0d
Co-authored-by: James Polley <jp@jamezpolley.com>
Merge "Replace more then just "-" in REPONAME"