Update build scripts to work on Gradle 6.1

Removes the custom JaCoCo report aggregation code, which is now handled
automatically by Gradle.

build.gradle

@@ -19,15 +19,14 @@ allprojects {
 
 apply from: 'gradle/properties.gradle'
 apply from: 'gradle/code-quality.gradle'
-apply from: 'gradle/testing.gradle'
 apply from: 'gradle/wrapper.gradle'
+apply plugin: "jacoco"
 
 gradle.projectsEvaluated {
     task check {
         def deps = []
         deps += getTasksByName("check", true).findAll { it.project != rootProject }
         deps += "detekt"
-        deps += jacocoReport
 
         dependsOn(deps)
     }

gradle/code-quality.gradle

@@ -12,8 +12,13 @@ detekt {
     parallel = true
 }
 
+
 sonarqube {
     properties {
+        property "sonar.organization", "apollo-rsps"
+        property "sonar.projectKey", "apollo:org.apollo"
+        property "sonar.projectName", "Apollo RSPS"
+        property "sonar.kotlin.file.suffixes", ".kt,.kts"
         property "sonar.kotlin.detekt.reportPaths", detektAggregateReport
     }
-}
+}

gradle/testing.gradle

@@ -1,81 +0,0 @@
-apply plugin: "jacoco"
-
-def jacocoCoverageAggregate = "$buildDir/jacoco/jacocoTestAll.exec"
-
-def testedProjects() {
-    subprojects.findAll { subproject -> subproject.plugins.hasPlugin('java') || subproject.plugins.hasPlugin('kotlin') }
-}
-gradle.projectsEvaluated {
-    configure(testedProjects()) {
-        apply plugin: "jacoco"
-
-        jacoco {
-            toolVersion = '0.8.4'
-        }
-
-        test {
-            reports {
-                junitXml.enabled = true
-                html.enabled = false
-            }
-
-            jacoco {
-                append = false
-                destinationFile = file("$buildDir/jacoco/jacocoTest.exec")
-                classDumpDir = file("$buildDir/jacoco/classpathdumps")
-            }
-        }
-    }
-
-    task jacocoMerge(type: JacocoMerge) {
-        destinationFile = file(jacocoCoverageAggregate)
-        executionData = project.fileTree(dir: '.', include: '**/build/jacoco/jacocoTest.exec')
-
-        dependsOn(getTasksByName('test', true))
-    }
-
-
-    task jacocoReport(type: JacocoReport) {
-        sourceDirectories = files()
-        classDirectories = files()
-        executionData = files()
-
-        reports {
-            html.enabled = true
-            xml.enabled = true
-            csv.enabled = false
-        }
-
-        // Work-around to allow us to build list of executionData files in doFirst
-        onlyIf = {
-            true
-        }
-
-        /*
-     * Builds list of source dirs, class dirs, and executionData files
-     * when task is run, not at script evaluation time
-     */
-        doFirst {
-            subprojects.findAll { subproject ->
-                subproject.pluginManager.hasPlugin('java') || subproject.pluginManager.hasPlugin('kotlin')
-            }.each { subproject ->
-                additionalSourceDirs files((Set<File>) subproject.sourceSets.main.allSource.srcDirs)
-                additionalClassDirs((FileCollection) subproject.sourceSets.main.output)
-            }
-
-            executionData = files(jacocoCoverageAggregate)
-        }
-
-        dependsOn(jacocoMerge)
-    }
-
-    sonarqube {
-        properties {
-            property "sonar.organization", "apollo-rsps"
-            property "sonar.projectKey", "apollo:org.apollo"
-            property "sonar.projectName", "Apollo RSPS"
-            property "sonar.kotlin.file.suffixes", ".kt,.kts"
-            property "sonar.jacoco.reportPaths", jacocoCoverageAggregate
-        }
-    }
-}

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1-all.zip