Change help message for volume-update

`nova volume-update <server> <volume> <volume>` to
`nova volume-update <server> <attachment> <volume>`

Change-Id: Ie820843c3e8d23659075c1d6b4fdd47f639b3b58
Closes-bug: 1326613
Convert Floating IP tests to httpretty

Change-Id: I0f6816868580af32ee93c0bfdf2c113c6c6ecd13
blueprint: httpretty-testing
Convert Floating IPs DNS tests to httpretty

Change-Id: I19dfadbe9103145a6b80d8ce10d2b6d3ce326ffa
blueprint: httpretty-testing
Convert Floating IP bulk tests to httpretty

Change-Id: I4b81963ab6a9924c5f2262f49a42baa56326964d
blueprint: httpretty-testing
add tox target for python 3.4

Ubuntu 14.04 has python 3.4 so add a 3.4 target. 
Note that this will fail unless
you have new enough virtualenv. Recommend you install the packaged
version of 1.11.4 and get rid of any pip installed ones.

Change-Id: Ib54dc49fca2463f1c5cd788b48d06bd85be52655
Merge "Change help message for volume-update"
Add posargs support to flake8 call

Add posargs to flake8 call in tox.ini, with this you can pass arguments
directly into flake8 using the following notation
  tox -epep8 -- --FLAKE8-ARG

This can be used to pass arguments like '--statistics' to flake8

Change-Id: Ia820d62c4a1f428d60d88b04d8a4d9b1442baa09
Merge "Convert Floating IP tests to httpretty"
Merge "Convert Floating IPs DNS tests to httpretty"
Merge "add tox target for python 3.4"
Merge "Convert Floating IP bulk tests to httpretty"
Merge "Add posargs support to flake8 call"