fixes issue where config sessions where left behind (#17673)

When using the Cli transport, if the session hung on a command and the
socket timed out, the config session would be left behind.  This change
will allow the shell to try to get control back and remove the config
session, assuming the channel is still open.

fixes ansible/ansible-modules-core#4945

lib/ansible/module_utils/eos.py

@@ -29,7 +29,7 @@
 import re
 import time
 
-from ansible.module_utils.basic import json
+from ansible.module_utils.basic import json, get_exception
 from ansible.module_utils.network import ModuleStub, NetworkError, NetworkModule
 from ansible.module_utils.network import add_argument, register_transport, to_list
 from ansible.module_utils.netcli import Command
@@ -81,6 +81,11 @@ class EosConfigMixin(object):
             else:
                 self.execute(['no configure session %s' % session])
         except NetworkError:
+            exc = get_exception()
+            if 'timeout trying to send command' in exc.message:
+                # try to get control back and get out of config mode
+                if isinstance(self, Cli):
+                    self.execute(['\x03', 'end'])
             self.abort_config(session)
             diff = None
             raise