Sync py3kcompat, sslutils, versionutils from Oslo

Dependencies identified by update.py for RPC update.

py3kcompat:
12d3bbc Add method quote_plus in module py3kcompat.urlutils
8575d87 Removed copyright from empty files
0d8f18b Use urlutils functions instead of urllib/urllib2
12bcdb7 Remove vim header
4c22556 Use py3kcompat urlutils functions instead of urlparse
71743d9 Add urlopen/URLError/pathname2url in urlutils
0f2906f py3kcompat: Add unquote
eaec23b py3kcompat: Add urljoin compatibility
35c317b Fix capitalization, it's OpenStack
4d12ad1 python3: Import translation layer

sslutils:
8b2b0b7 Use hacking import_exceptions for gettextutils._
12bcdb7 Remove vim header
1a2df89 Enable H302 hacking check
99b7c35 Convert kombu SSL version string into integer
b0b37ce Fix IBM copyright strings
f63ea05 Use oslo-config-2013.1b3
e50b68c Support for SSL in wsgi.Service

versionutils:
8b2b0b7 Use hacking import_exceptions for gettextutils._
a5ae087 fixed typos
45658e2 Fix violations of H302:import only modules
37ea814 Adds decorator to deprecate functions and methods
12bcdb7 Remove vim header
d7d74a7 Add `versionutils` for version compatibility checks

Oslo version:
7a51572 Merge "Implement cache abstraction layer"
Date:   Wed Jan 15 19:31:16 2014 +0000

Change-Id: I72a4ddaa015ce4a8016d580c922e8f7664376cb7
Merge "Sync py3kcompat, sslutils, versionutils from Oslo"