Revert "fix tests: make ipv6 addr verbose"

This reverts commit a919eee35b89a205da6a0acf417573d1068f94eb.

See: https://github.com/bencevans/node-compact2string/pull/10
package.json: bump compact2string dependency to 1.4.0
Merge pull request #2 from astro/short-ipv6-addrs

Short ipv6 addrs