Fix pylint gate

Nodeset was not set so it tries to run the gate on the default
host, since the pylint gate is running in python2.7 it fails.
So set it to ubuntu-xenial. Also fix python2.7 because it
was failing as well.

Story: 2009101
Task: 43149

Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: I7b3430fbf9a77ba6796e0b12136d0a266cba078e

.zuul.yaml

@@ -70,6 +70,7 @@
     parent: tox
     description: |
       Run pylint test for k8sapp_platform
+    nodeset: ubuntu-xenial
     required-projects:
       - starlingx/config
       - starlingx/fault

python-k8sapp-platform/k8sapp_platform/requirements.txt

@@ -1,3 +1,2 @@
-pbr>=2.0.0
+pbr>=0.5
 PyYAML>=3.10
-

python-k8sapp-platform/k8sapp_platform/setup.py

@@ -8,5 +8,5 @@ import setuptools
 
 
 setuptools.setup(
-    setup_requires=['pbr>=2.0.0'],
+    setup_requires=['pbr>=0.5'],
     pbr=True)

python-k8sapp-platform/k8sapp_platform/tox.ini

@@ -10,11 +10,11 @@ stxdir = {toxinidir}/../../..
 distshare={toxworkdir}/.tox/distshare
 
 [testenv]
-# usedevelop = True
 # enabling usedevelop results in  py27 develop-inst:
 # Exception: Versioning for this project requires either an sdist tarball,
 # or access to an upstream git repository.
 # Note. site-packages is true and rpm-python must be yum installed on your dev machine.
+usedevelop = True
 sitepackages = True
 
 # tox is silly... these need to be separated by a newline....
@@ -167,8 +167,6 @@ commands = bandit --ini tox.ini -n 5 -r k8sapp_platform
 
 [testenv:pylint]
 basepython = python2.7
-sitepackages = False
-
 deps = {[testenv]deps}
        pylint
 commands =