Issue-9704 Better handling of missing python

When they python interpreter is set incorrectly for the machine the file
is being checked for (e.g. for the local or the remote), the error
manifests as a readability or directory missing error which can be very
misleading.

lib/ansible/runner/action_plugins/copy.py

@@ -192,6 +192,10 @@ class ActionModule(object):
                     dest_file = conn.shell.join_path(dest, source_rel)
                     remote_checksum = self.runner._remote_checksum(conn, tmp_path, dest_file, inject)
 
+            if remote_checksum == '4':
+                result = dict(msg="python isn't present on the system.  Unable to compute checksum", failed=True)
+                return ReturnData(conn=conn, result=result)
+
             if remote_checksum != '1' and not force:
                 # remote_file does not exist so continue to next iteration.
                 continue

lib/ansible/runner/action_plugins/fetch.py

@@ -129,7 +129,7 @@ class ActionModule(object):
             elif remote_checksum == '3':
                 result = dict(msg="remote file is a directory, fetch cannot work on directories", file=source, changed=False)
             elif remote_checksum == '4':
-                result = dict(msg="python isn't present on the remote system.  Unable to fetch file", file=source, changed=False)
+                result = dict(msg="python isn't present on the system.  Unable to compute checksum", file=source, changed=False)
             return ReturnData(conn=conn, result=result)
 
         # calculate checksum for the local file

lib/ansible/runner/action_plugins/unarchive.py

@@ -83,6 +83,9 @@ class ActionModule(object):
                 source = utils.path_dwim(self.runner.basedir, source)
 
         remote_checksum = self.runner._remote_checksum(conn, tmp, dest, inject)
+        if remote_checksum == '4':
+            result = dict(failed=True, msg="python isn't present on the system.  Unable to compute checksum")
+            return ReturnData(conn=conn, result=result)
         if remote_checksum != '3':
             result = dict(failed=True, msg="dest '%s' must be an existing dir" % dest)
             return ReturnData(conn=conn, result=result)