Retry SSH on ConnectionResetError

If a target host temporarily looses connection, for example upon
resetting a test VM as part of a parametrized test run, retry the SSH
connection the same way it is retried upon an SSH exception.

Signed-off-by: Georg Pfuetzenreuter <georg.pfuetzenreuter@suse.com>

testinfra/backend/paramiko.py

@@ -135,7 +135,7 @@ def run(self, command, *args, **kwargs):
         command = self.encode(command)
         try:
             rc, stdout, stderr = self._exec_command(command)
-        except paramiko.ssh_exception.SSHException:
+        except (paramiko.ssh_exception.SSHException, ConnectionResetError):
             if not self.client.get_transport().is_active():
                 # try to reinit connection (once)
                 del self.client