Fix tests on python 2.6 and mark as deprecated

Pin mock to < 1.1 as newer versions no longer work on python 2.6.
Remove duplicate unittest2 for python 2.6 test env.
Adding warning to mark python 2.6 support as deprecated and intended to
be removed.

Testtools re-added the requirement for unittest2 so the separate
dependency for python 2.6 created a duplicate error that causes tox
to fail.

Change-Id: Ia79eeeb5d2432cf1025631a1722de5fb1babe2c9

jenkins/__init__.py

@@ -49,6 +49,8 @@ import base64
 import json
 import re
 import socket
+import sys
+import warnings
 
 import six
 from six.moves.http_client import BadStatusLine
@@ -57,6 +59,10 @@ from six.moves.urllib.error import URLError
 from six.moves.urllib.parse import quote, urlencode
 from six.moves.urllib.request import Request, urlopen
 
+if sys.version_info < (2, 7, 0):
+    warnings.warn("Support for python 2.6 is deprecated and will be removed.")
+
+
 LAUNCHER_SSH = 'hudson.plugins.sshslaves.SSHLauncher'
 LAUNCHER_COMMAND = 'hudson.slaves.CommandLauncher'
 LAUNCHER_JNLP = 'hudson.slaves.JNLPLauncher'

test-requirements.txt

@@ -1,7 +1,7 @@
 coverage>=3.6
 discover
 hacking>=0.5.6,<0.11
-mock
+mock<1.1
 unittest2
 python-subunit
 sphinx>=1.1.2,<1.2

tox.ini

@@ -17,11 +17,6 @@ commands =
     coverage report --omit="tests/*" --show-missing
     coverage html --omit="tests/*" -d cover
 
-[testenv:py26]
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-       unittest2
-
 [tox:jenkins]
 downloadcache = ~/cache/pip