[ci skip] Run ctest verbose to get failure info

.travis.yml

@@ -72,7 +72,7 @@ script:
 - if [[ "${COVERITY_SCAN_BRANCH}" != 1 && "$TRAVIS_OS_NAME" == "osx" ]]; then ../CIBuild/osx/fix_lib_paths.sh ./bin_release; fi
 
 # Run unit tests
-- if [[ "${COVERITY_SCAN_BRANCH}" != 1 ]]; then make all test -j2; fi
+- if [[ "${COVERITY_SCAN_BRANCH}" != 1 ]]; then ctest --verbose; fi
 
 # Generate installers
 - if [[ "${COVERITY_SCAN_BRANCH}" != 1 && "${COVERAGE}" != 1 ]]; then cpack -C Release; fi