Use Oslo module py3kcompat

Module py3kcompat can be used to make libraries urllib urllib2 urlparse
Python3 compatible. This patch aslo add file openstack-common.conf to
track files from Olso-incubator as we did in other projects.

Change-Id: I8973672c469ffd264e01fe26a4d265f89f7d1755

openstack-common.conf

@@ -0,0 +1,10 @@
+[DEFAULT]
+
+module=importutils
+module=jsonutils
+module=log
+module=py3kcompat
+module=timeutils
+
+# The base module to hold the copy of oslo-incubator
+base=stackalytics

stackalytics/openstack/common/py3kcompat/urlutils.py

@@ -0,0 +1,67 @@
+#
+# Copyright 2013 Canonical Ltd.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+#
+
+"""
+Python2/Python3 compatibility layer for OpenStack
+"""
+
+import six
+
+if six.PY3:
+    # python3
+    import urllib.error
+    import urllib.parse
+    import urllib.request
+
+    urlencode = urllib.parse.urlencode
+    urljoin = urllib.parse.urljoin
+    quote = urllib.parse.quote
+    quote_plus = urllib.parse.quote_plus
+    parse_qsl = urllib.parse.parse_qsl
+    unquote = urllib.parse.unquote
+    unquote_plus = urllib.parse.unquote_plus
+    urlparse = urllib.parse.urlparse
+    urlsplit = urllib.parse.urlsplit
+    urlunsplit = urllib.parse.urlunsplit
+    SplitResult = urllib.parse.SplitResult
+
+    urlopen = urllib.request.urlopen
+    URLError = urllib.error.URLError
+    pathname2url = urllib.request.pathname2url
+else:
+    # python2
+    import urllib
+    import urllib2
+    import urlparse
+
+    urlencode = urllib.urlencode
+    quote = urllib.quote
+    quote_plus = urllib.quote_plus
+    unquote = urllib.unquote
+    unquote_plus = urllib.unquote_plus
+
+    parse = urlparse
+    parse_qsl = parse.parse_qsl
+    urljoin = parse.urljoin
+    urlparse = parse.urlparse
+    urlsplit = parse.urlsplit
+    urlunsplit = parse.urlunsplit
+    SplitResult = parse.SplitResult
+
+    urlopen = urllib2.urlopen
+    URLError = urllib2.URLError
+    pathname2url = urllib.pathname2url