Revert "Merge pull request #399 from Zipfer/floating_ip"

This reverts commit 0027df77e7b807813087c8cf9699ec1571388598, reversing
changes made to dd25f310ecc9a09e1db63ef29d3505286bf15784.

Will be merged back with FUEL-777 branch as soon as required gems are
added to ISO.
Merge pull request #401 from aglarendil/develop

Revert "Merge pull request #399 from Zipfer/floating_ip"