try a custom cache plugin, then.

Signed-off-by: Rick Elrod <relrod@redhat.com>

cache_plugins/fedora_jsonfile.py

@@ -0,0 +1,71 @@
+# (c) 2014, Brian Coca, Josh Drake, et al
+# (c) 2017 Ansible Project
+# (c) 2019 Red Hat, Inc. via Fedora
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# This is a hack to stop caching discovered_interpreter_python
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+NEVER_CACHE_KEYS = ['discovered_interpreter_python']
+
+DOCUMENTATION = '''
+    cache: fedora_jsonfile
+    short_description: JSON formatted files.
+    description:
+        - This cache uses JSON formatted, per host, files saved to the filesystem.
+    version_added: "1.9"
+    author: Ansible Core (@ansible-core)
+    options:
+      _uri:
+        required: True
+        description:
+          - Path in which the cache plugin will save the JSON files
+        env:
+          - name: ANSIBLE_CACHE_PLUGIN_CONNECTION
+        ini:
+          - key: fact_caching_connection
+            section: defaults
+      _prefix:
+        description: User defined prefix to use when creating the JSON files
+        env:
+          - name: ANSIBLE_CACHE_PLUGIN_PREFIX
+        ini:
+          - key: fact_caching_prefix
+            section: defaults
+      _timeout:
+        default: 86400
+        description: Expiration timeout for the cache plugin data
+        env:
+          - name: ANSIBLE_CACHE_PLUGIN_TIMEOUT
+        ini:
+          - key: fact_caching_timeout
+            section: defaults
+        type: integer
+'''
+
+import codecs
+import json
+
+from ansible.parsing.ajson import AnsibleJSONEncoder, AnsibleJSONDecoder
+from ansible.plugins.cache import BaseFileCacheModule
+
+
+class CacheModule(BaseFileCacheModule):
+    """
+    A caching module backed by json files.
+    """
+
+    def _load(self, filepath):
+        # Valid JSON is always UTF-8 encoded.
+        with codecs.open(filepath, 'r', encoding='utf-8') as f:
+            return json.load(f, cls=AnsibleJSONDecoder)
+
+    def _dump(self, value, filepath):
+        for k in NEVER_CACHE_KEYS:
+            if k in value:
+                del value[k]
+        with codecs.open(filepath, 'w', encoding='utf-8') as f:
+            f.write(json.dumps(value, cls=AnsibleJSONEncoder, sort_keys=True, indent=4))