Silence ctest when running for coverage

Summary:
There's no need to see the results of tests, since we are only running
ctest to generate code coverage reports.

Reviewers: buda

Reviewed By: buda

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D461

coverage

@@ -1,15 +1,15 @@
 #!/bin/bash
 
 working_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
- 
+
 # coverage applies only on unit tests
 unit_test_dir='build/tests/unit'
 coverage_dir='build/coverage'
 coverage_file='coverage.info'
- 
+
 # execute unit tests to generate coverage files
 pushd ${unit_test_dir}
-ctest -R unit
+ctest -R unit --quiet
 popd
 
 # generate coverage info files for each unit test binary