tests/acceptance: Print expected message on wait_for_console_pattern

tests/acceptance: Print expected message on wait_for_console_pattern

For the sake of improve debuggability of tests which use the
wait_for_console_pattern(), this changed the _console_interaction() so that
the expected message is printed if the test fail.

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Message-Id: <20210309153507.1905682-1-wainersm@redhat.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Signed-off-by: Cleber Rosa <crosa@redhat.com>