Add functools.wraps on all function decorators

See [1], this enhances logging and keeps the docstrings.

[1]: https://docs.python.org/2/library/functools.html#functools.wraps

Change-Id: I33beb28abb9a1a955fb3b5a99fd5eec7efecbc06
Add REVIEWING.rst

This commit adds a file to outline what to look for as a tempest code
reviewer.

Change-Id: I945469842183d0e5022cd41f823d4892adff333f
Catch BadRequest exception from correct module

Catch the correct BadRequest exception from the neutron
client module so deployments that don't support overlapping
IP addresses can be tested.

Change-Id: Ica58ffbff6cedd362e2b2b807438ec61bddf2f25
Closes-Bug: #1359508
Merge "Catch BadRequest exception from correct module"
Merge "Add REVIEWING.rst"
Merge "Add functools.wraps on all function decorators"
Merge branch 'master' of https://github.com/openstack/tempest

Conflicts:
	tempest/common/isolated_creds.py