enable jacoco root level coverage report for coveralls (fix broken bu…

…ild)

build.gradle

@@ -121,7 +121,14 @@ task jacocoRootReport(type: org.gradle.testing.jacoco.tasks.JacocoReport) {
 }
 
 coveralls {
-    dependsOn = jacocoRootReport
     sourceDirs = subprojects.sourceSets.main.allSource.srcDirs.flatten()
     jacocoReportPath = "${buildDir}/reports/jacoco/jacocoRootReport/jacocoRootReport.xml"
 }
+
+tasks.coveralls {
+    group = 'Coverage reports'
+    description = 'Uploads the aggregated coverage report to Coveralls'
+
+    dependsOn jacocoRootReport
+    onlyIf { System.env.'CI' && !JavaVersion.current().isJava9Compatible() }
+}