Switch to Python 3.7 and Alpine 3.10

It also allows building docs as doc8 is broken due to latest
OpenStack's upper-constraints.

pylint is updated to 2.3.1 (lastest py3.7 version)

It disables perm as umask is currently false on lf-virtual1.

Change-Id: I8568eeafa44c5dba72e206c532c1f50e3ad547f2
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

3 files changed, 5 insertions, 6 deletions

diff --git a/xtesting/ci/run_tests.py b/xtesting/ci/run_tests.py
index 94bf2787..5e2b49e5 100644
--- a/xtesting/ci/run_tests.py
+++ b/xtesting/ci/run_tests.py
@@ -46,10 +46,9 @@ class Result(enum.Enum):
 
 class BlockingTestFailed(Exception):
     """Exception when the blocking test fails"""
-    pass
 
 
-class RunTestsParser(object):
+class RunTestsParser():
     """Parser to run tests"""
     # pylint: disable=too-few-public-methods
 
@@ -78,7 +77,7 @@ class RunTestsParser(object):
         return vars(self.parser.parse_args(argv))
 
 
-class Runner(object):
+class Runner():
     """Runner class"""
 
     def __init__(self):
diff --git a/xtesting/ci/tier_builder.py b/xtesting/ci/tier_builder.py
index b0050b13..27afc7d1 100644
--- a/xtesting/ci/tier_builder.py
+++ b/xtesting/ci/tier_builder.py
@@ -16,7 +16,7 @@ from xtesting.ci import tier_handler
 from xtesting.utils import env
 
 
-class TierBuilder(object):
+class TierBuilder():
     # pylint: disable=missing-docstring
 
     def __init__(self, testcases_file):
diff --git a/xtesting/ci/tier_handler.py b/xtesting/ci/tier_handler.py
index 4b74e37c..8359d91c 100644
--- a/xtesting/ci/tier_handler.py
+++ b/xtesting/ci/tier_handler.py
@@ -34,7 +34,7 @@ def split_text(text, max_len):
     return lines
 
 
-class Tier(object):
+class Tier():
 
     def __init__(self, name, order, description=""):
         self.tests_array = []
@@ -96,7 +96,7 @@ class Tier(object):
         return msg.get_string()
 
 
-class TestCase(object):
+class TestCase():
 
     def __init__(self, name, enabled, skipped, criteria, blocking,
                  description="", project=""):