libtests/can01: Excessive test output

[Sebastian Huber]

Hello Prashanth,

the test program libtests/can01 produces a lot of output (more than 7000 
lines). Could you please strip this down to a reasonable amount (less 
than 100).

What are the test objectives? From looking at the assertions, not much 
from the CAN framework is tested:

grep -r assert testsuites/libtests/can01/
testsuites/libtests/can01/init.c:  rtems_test_assert(fd >= 0);
testsuites/libtests/can01/init.c:    rtems_test_assert(count == msg_size);
testsuites/libtests/can01/init.c:    rtems_test_assert(count > 0);
testsuites/libtests/can01/init.c:    rtems_test_assert(result == 
RTEMS_SUCCESSFUL);
testsuites/libtests/can01/init.c:    rtems_test_assert(result == 
RTEMS_SUCCESSFUL);
testsuites/libtests/can01/init.c:    rtems_test_assert(ret == 
RTEMS_SUCCESSFUL);

The test objectives should be checked by assertions. If one of them 
fails, then no end of test message should be printed.

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