Reduce Travis log spam

[cmihai]

Previously, the Makefile scripts for each individual unit test were displayed for debugging purposes. This commit suppresses this output, which should make the Travis log smaller.

Note that, just after the unit tests, we also test unit-e-tx, which also prints its testcases. This output should not be suppressed, since the test takes a long time, and the Travis build can timeout if it doesn't see any output for a while.

[castarco]

@cmihai can you please post a small snippet with an example of the output will be suppressed?

[cmihai]

Sure. Before the change:

for test_suite in `cat test/base64_tests.cpp | grep -E "(BOOST_FIXTURE_TEST_SUITE\\(|BOOST_AUTO_TEST_SUITE\\()" | cut -d '(' -f 2 | cut -d ',' -f 1 | cut -d ')' -f 1`; do \
    echo ${test_suite}... \
    test/test_unite -l test_suite -t $test_suite > test/base64_tests.cpp"-"$test_suite".log" 2>&1 && (echo "Success: $test_suite from test/base64_tests.cpp") || ((echo "Failure: $test_suite from test/base64_tests.cpp"); cat test/base64_tests.cpp"-"$test_suite".log" && false) \
done
Success: base32_tests from test/base32_tests.cpp

After the change:

Success: base32_tests from test/base32_tests.cpp

[scravy]

Ah! I would like to add that this fixes actually a regression which was introduced in the 0.17 merge. Before the line would look like "After the change".