Improve consistency of ansible-test pylint results. (#70132)

* Disable too-many-ancestors pylint check.

This check was only enabled for ansible-test code.

In some cases this check counts 1 more ancestor in python 3.7+ than under python 3.6, making the check inconsistent and unsuitable for use in ansible-test.

* Disable additional pylint checks:

- import-error
- no-name-in-module

These checks were only enabled for ansible-test code.

These checks provide inconsistent results since they are dependent on available imports, which vary between environments.

It may be practical to enable these checks in the future if changes are made to ensure a consistent test environment for pylint.

test/lib/ansible_test/_data/sanity/pylint/config/ansible-test.cfg

@@ -5,8 +5,11 @@ disable=
     consider-using-set-comprehension,  # requires Python 2.7+, but we still require Python 2.6 support
     cyclic-import,  # consistent results require running with --jobs 1 and testing all files
     duplicate-code,  # consistent results require running with --jobs 1 and testing all files
+    import-error,  # inconsistent results which depend on the availability of imports
+    no-name-in-module,  # inconsistent results which depend on the availability of imports
     no-self-use,
     too-few-public-methods,
+    too-many-ancestors,  # inconsistent results between python 3.6 and 3.7+
     too-many-arguments,
     too-many-branches,
     too-many-instance-attributes,

test/lib/ansible_test/_data/sanity/pylint/config/collection.cfg

@@ -35,7 +35,7 @@ disable=
     function-redefined,
     global-statement,
     global-variable-undefined,
-    import-error,
+    import-error,  # inconsistent results which depend on the availability of imports
     import-self,
     inconsistent-return-statements,
     invalid-envvar-default,
@@ -53,7 +53,7 @@ disable=
     no-else-return,
     no-init,
     no-member,
-    no-name-in-module,
+    no-name-in-module,  # inconsistent results which depend on the availability of imports
     no-self-use,
     no-value-for-parameter,
     non-iterator-returned,
@@ -78,7 +78,7 @@ disable=
     super-init-not-called,
     superfluous-parens,
     too-few-public-methods,
-    too-many-ancestors,
+    too-many-ancestors,  # inconsistent results between python 3.6 and 3.7+
     too-many-arguments,
     too-many-boolean-expressions,
     too-many-branches,

test/lib/ansible_test/_data/sanity/pylint/config/default.cfg

@@ -35,7 +35,7 @@ disable=
     function-redefined,
     global-statement,
     global-variable-undefined,
-    import-error,
+    import-error,  # inconsistent results which depend on the availability of imports
     import-self,
     inconsistent-return-statements,
     invalid-envvar-default,
@@ -53,7 +53,7 @@ disable=
     no-else-return,
     no-init,
     no-member,
-    no-name-in-module,
+    no-name-in-module,  # inconsistent results which depend on the availability of imports
     no-self-use,
     no-value-for-parameter,
     non-iterator-returned,
@@ -78,7 +78,7 @@ disable=
     super-init-not-called,
     superfluous-parens,
     too-few-public-methods,
-    too-many-ancestors,
+    too-many-ancestors,  # inconsistent results between python 3.6 and 3.7+
     too-many-arguments,
     too-many-boolean-expressions,
     too-many-branches,

test/lib/ansible_test/_data/sanity/pylint/config/sanity.cfg

@@ -5,8 +5,11 @@ disable=
     consider-using-set-comprehension,  # requires Python 2.7+, but we still require Python 2.6 support
     cyclic-import,  # consistent results require running with --jobs 1 and testing all files
     duplicate-code,  # consistent results require running with --jobs 1 and testing all files
+    import-error,  # inconsistent results which depend on the availability of imports
     missing-docstring,
+    no-name-in-module,  # inconsistent results which depend on the availability of imports
     too-few-public-methods,
+    too-many-ancestors,  # inconsistent results between python 3.6 and 3.7+
     too-many-arguments,
     too-many-branches,
     too-many-instance-attributes,