This imports some of the changes made in the official Debian packaging
repository: https://anonscm.debian.org/cgit/pkg-voip/ring.git

- Don't run containers in interactive mode, which would require a TTY

- Build LRC with Debug symbols

- Build with V=1 to allow parsing logs

- Reorganize dependencies

- Try fetch-all three times before giving up

- Removed ubuntu15.04 references

Tuleap: #858
Change-Id: If0a81b15230a31d120982e113e695443262568e3