Python 3.8 collections compatibility fixes.

Includes a new pylint blacklist plugin to prevent regressions.

lib/ansible/plugins/inventory/__init__.py

@@ -24,12 +24,11 @@ import os
 import re
 import string
 
-from collections import Mapping
-
 from ansible.errors import AnsibleError, AnsibleParserError
 from ansible.plugins import AnsiblePlugin
 from ansible.plugins.cache import InventoryFileCacheModule
 from ansible.module_utils._text import to_bytes, to_native
+from ansible.module_utils.common._collections_compat import Mapping
 from ansible.module_utils.parsing.convert_bool import boolean
 from ansible.module_utils.six import string_types
 from ansible.template import Templar

lib/ansible/plugins/inventory/foreman.py

@@ -62,11 +62,11 @@ validate_certs: False
 
 import re
 
-from collections import MutableMapping
 from distutils.version import LooseVersion
 
 from ansible.errors import AnsibleError
 from ansible.module_utils._text import to_bytes, to_native
+from ansible.module_utils.common._collections_compat import MutableMapping
 from ansible.plugins.inventory import BaseInventoryPlugin, Cacheable
 
 # 3rd party imports

lib/ansible/plugins/inventory/script.py

@@ -41,12 +41,12 @@ DOCUMENTATION = '''
 
 import os
 import subprocess
-from collections import Mapping
 
 from ansible.errors import AnsibleError, AnsibleParserError
 from ansible.module_utils.basic import json_dict_bytes_to_unicode
 from ansible.module_utils.six import iteritems
 from ansible.module_utils._text import to_native, to_text
+from ansible.module_utils.common._collections_compat import Mapping
 from ansible.plugins.inventory import BaseInventoryPlugin, Cacheable
 
 

lib/ansible/plugins/inventory/virtualbox.py

@@ -48,11 +48,11 @@ simple_config_file:
 
 import os
 
-from collections import MutableMapping
 from subprocess import Popen, PIPE
 
 from ansible.errors import AnsibleParserError
 from ansible.module_utils._text import to_bytes, to_native, to_text
+from ansible.module_utils.common._collections_compat import MutableMapping
 from ansible.plugins.inventory import BaseInventoryPlugin, Constructable, Cacheable
 
 

lib/ansible/plugins/inventory/yaml.py

@@ -60,11 +60,10 @@ all: # keys must be unique, i.e. only one 'hosts' per group
 
 import os
 
-from collections import MutableMapping
-
 from ansible.errors import AnsibleParserError
 from ansible.module_utils.six import string_types
 from ansible.module_utils._text import to_native
+from ansible.module_utils.common._collections_compat import MutableMapping
 from ansible.parsing.utils.addresses import parse_address
 from ansible.plugins.inventory import BaseFileInventoryPlugin, detect_range, expand_hostname_range