Merge branch 'update_jacoco' into 'master'

Update JaCoCo to version 0.8.8

See merge request !349

build.gradle

@@ -218,7 +218,7 @@ subprojects {
 // and packaged with biz.aQute.bnd.
 configure(subprojects.findAll { it.provides }) {
   // Code coverage configuration.
-  jacoco.toolVersion = '0.8.7'
+  jacoco.toolVersion = '0.8.8'
   jacocoTestReport {
     reports { xml.required = true }
     classDirectories.setFrom(sourceSets.main.output.classesDirs)