update pylint

The older version of pylint does not work under python 3, so update to
a newer version. Update astroid at the same time so it is a compatible
version as well.

Disable the import-error lint check since it prevents the job from
passing but the unit test jobs do work.

Co-Authored-By: Nguyen Hai <nguyentrihai93@gmail.com>
Change-Id: I2ddf8985c2b9b6286ddb4cbfd9f3edd2002223c1
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

.pylintrc

@@ -44,7 +44,7 @@ symbols=no
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
-disable=W,C,R
+disable=W,C,R,import-error
 
 
 [REPORTS]

requirements.txt

@@ -4,7 +4,7 @@ python-monascaclient>=1.1.0 # Apache-2.0
 python-neutronclient>=5.1.0  # Apache-2.0
 python-novaclient>=6.0.0  # Apache-2.0
 PyYAML>=3.10.0  # MIT
-oslo.config>=3.14.0 # Apache-2.0
+oslo.config>=3.14.0,!=4.4.0,!=4.3.0  # Apache-2.0
 oslo.utils>=3.18.0                       # Apache-2.0
 oslo.log>=3.11.0  # Apache-2.0
 libvirt-python>=1.2.5                   # LGPLv2+

test-requirements.txt

@@ -1,16 +1,16 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-astroid===1.3.6
+astroid==1.6.5 # LGPLv2.1
 flake8>=2.5.4,<2.6.0  # MIT
 hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
 coverage>=3.6
 mock>=1.0
 pep8==1.5.7
 mccabe==0.2.1 # MIT License
-pylint==1.4.4  # GNU GPL v2
+pylint==1.9.2 # GPLv2
 pyflakes==0.8.1
 stestr>=2.0.0 # Apache-2.0
 testtools>=0.9.36
 oslosphinx>=2.5.0 # Apache-2.0
-sphinx>=1.1.2  # BSD
+sphinx>=1.1.2,!=1.6.7,!=1.6.6  # BSD