tests: Do not parse configuration file in torture_knownhosts
The test might fail if there is a local configuration file that changes
the location of the known_hosts file. The test should not be affected
by configuration files present in the testing environment.
Signed-off-by: Anderson Toshiyuki Sasaki <firstname.lastname@example.org>
Reviewed-by: Jakub Jelen <email@example.com>