Revert "Allow admin user to get all tenant's floating IPs"

This reverts commit 6478554f531f6ee2fa86226fbc79dd31e556bc06.

This API change merged as a bug fix and introduced bugs and our API
change policy is more or less to go through the blueprint/nova-specs
review process:

http://lists.openstack.org/pipermail/openstack-dev/2014-June/037536.html

So reverting this so it can go through the blueprint/nova-specs
review process.

There should be minimal impacts to removing this (broken) API since
it merged not too long ago and was added strictly for Ceilometer's
usage, not an external deployer that would be (more) broken by this
API removal.

Closes-Bug: #1328694

Change-Id: I22a711795ea616aabc155a71703c9c794e84a5dc
Merge "Revert "Allow admin user to get all tenant's floating IPs""