suppress test suite output in Gradle build

this was very annoying and made it hard to find real errors

Author: gavinking

hibernate-reactive-core/build.gradle

@@ -71,7 +71,7 @@ tasks.withType(Test) {
     defaultCharacterEncoding = "UTF-8"
     testLogging {
         displayGranularity 1
-        showStandardStreams = true
+        showStandardStreams = false
         showStackTraces = true
         exceptionFormat = 'full'
         events 'PASSED', 'FAILED', 'SKIPPED'