Rename dring to jamid, ring to jami.

Automated via the following command:

  $ git grep -l dring | grep -v '.ts$' | xargs sed -i
  's/dring/jamid/g'
  $ git ls-files | xargs sed -i 's,bin/jamid.lib,bin/jami.lib,g'
  $ git ls-files | xargs sed -i 's,src/jamid,src/jami,g'
  $ git ls-files | xargs sed -i 's,-mutejamid,-mutejami,g'
  $ git checkout docker

Change-Id: I030209b60817372f866055daadb4d0a1c1e2e9df