Build: Increase the number of failed tests shown in test summary

We had increased this in maven, but it was lost in the transition to
gradle. This change adds it as a configurable setting the the logger for
randomized testing and bumps it to 25.

buildSrc/src/main/groovy/com/carrotsearch/gradle/junit4/TestLoggingConfiguration.groovy

@@ -1,5 +1,6 @@
 package com.carrotsearch.gradle.junit4
 
+import org.gradle.api.tasks.Input
 import org.gradle.util.ConfigureUtil
 
 class TestLoggingConfiguration {
@@ -20,6 +21,10 @@ class TestLoggingConfiguration {
     SlowTestsConfiguration slowTests = new SlowTestsConfiguration()
     StackTraceFiltersConfiguration stackTraceFilters = new StackTraceFiltersConfiguration()
 
+    /** Summarize the first N failures at the end of the test. */
+    @Input
+    int showNumFailuresAtEnd = 3 // match TextReport default
+
     void slowTests(Closure closure) {
         ConfigureUtil.configure(closure, slowTests)
     }
@@ -31,4 +36,8 @@ class TestLoggingConfiguration {
     void outputMode(String mode) {
         outputMode = mode.toUpperCase() as OutputMode
     }
+
+    void showNumFailuresAtEnd(int n) {
+        showNumFailuresAtEnd = n
+    }
 }

buildSrc/src/main/groovy/com/carrotsearch/gradle/junit4/TestReportLogger.groovy

@@ -48,9 +48,6 @@ class TestReportLogger extends TestsSummaryEventListener implements AggregatedEv
     /** Format line for JVM ID string. */
     String jvmIdFormat
 
-    /** Summarize the first N failures at the end. */
-    int showNumFailuresAtEnd = 3
-
     /** Output stream that logs messages to the given logger */
     LoggingOutputStream outStream
     LoggingOutputStream errStream
@@ -110,13 +107,13 @@ class TestReportLogger extends TestsSummaryEventListener implements AggregatedEv
 
     @Subscribe
     void onQuit(AggregatedQuitEvent e) throws IOException {
-        if (showNumFailuresAtEnd > 0 && !failedTests.isEmpty()) {
+        if (config.showNumFailuresAtEnd > 0 && !failedTests.isEmpty()) {
             List<Description> sublist = this.failedTests
             StringBuilder b = new StringBuilder()
             b.append('Tests with failures')
-            if (sublist.size() > showNumFailuresAtEnd) {
-                sublist = sublist.subList(0, showNumFailuresAtEnd)
-                b.append(" (first " + showNumFailuresAtEnd + " out of " + failedTests.size() + ")")
+            if (sublist.size() > config.showNumFailuresAtEnd) {
+                sublist = sublist.subList(0, config.showNumFailuresAtEnd)
+                b.append(" (first " + config.showNumFailuresAtEnd + " out of " + failedTests.size() + ")")
             }
             b.append(':\n')
             for (Description description : sublist) {

buildSrc/src/main/groovy/org/elasticsearch/gradle/BuildPlugin.groovy

@@ -365,6 +365,7 @@ class BuildPlugin implements Plugin<Project> {
             enableSystemAssertions false
 
             testLogging {
+                showNumFailuresAtEnd 25
                 slowTests {
                     heartbeat 10
                     summarySize 5