APT source whitelist request for zeroc-ice

[rleigh-codelibre]

ZeroC Ice is packaged in Ubuntu (zeroc-ice), but the version is old and unsupported, making use of these package for Travis testing problematic. This repository provides the latest stable release directly from the upstream developers, which is what we would like to test against.

We use this in the openmicroscopy project extensively. Currently we are forced to use the precise Ice 3.4 version in our travis configuration but this is no longer supported upstream for many years, nor by ourselves, and we need a newer version to be able to continue to use Travis for testing on the container-based infrastructure.

If you could consider whitelisting this repository, it would be greatly appreciated.

"alias": "zeroc-trusty",
"sourceline": "deb http://zeroc.com/download/apt/ubuntu14.04 stable main",
"key_url": "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x5E6DA83306132997"

See also: #330