SCB-2248 Update jacoco version to 0.8.6 for Java 11

Jacoco issue https://github.com/jacoco/jacoco/issues/551
diff --git a/pom.xml b/pom.xml
index 0220bb7..e16cfbd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -72,6 +72,7 @@
     <javax.activation.version>1.1.1</javax.activation.version>
     <tomcat-annotations-api.version>6.0.53</tomcat-annotations-api.version>
     <maven-dependency-plugin.version>3.0.2</maven-dependency-plugin.version>
+    <jacoco-maven-plugin.version>0.8.6</jacoco-maven-plugin.version>
     <netty.boringssl.version>2.0.36.Final</netty.boringssl.version>
     <netty.version>4.1.59.Final</netty.version>
     <zookeeper.version>3.6.2</zookeeper.version>
@@ -733,7 +734,7 @@
         <plugin>
           <groupId>org.jacoco</groupId>
           <artifactId>jacoco-maven-plugin</artifactId>
-          <version>0.7.8</version>
+          <version>${jacoco-maven-plugin.version}</version>
           <executions>
             <execution>
               <id>default-prepare-agent</id>