Fix run-tests.sh (#1821)

As the output of gradlew is piped to tee, the return value is lost.
This can be fixed by using pipefail which sets the return value of
a pipeline is the value of the last (rightmost) command to exit with
a non-zero status

JAVA-5983

---------

Co-authored-by: Nabil Hachicha <nabil.hachicha@gmail.com>

Author: rozza

.evergreen/run-tests.sh

@@ -2,6 +2,7 @@
 
 set -o xtrace   # Write all commands first to stderr
 set -o errexit  # Exit the script with error if any of the commands fail
+set -o pipefail # Exit if any command in a pipe fails
 
 # Supported/used environment variables:
 #   AUTH                                 Set to enable authentication. Values are: "auth" / "noauth" (default)