Switch kata to java 16

.gitlab-common-ci.yml

@@ -10,7 +10,7 @@ stages:
   - build
 
 .java-parent:
-  image: maven:3.6.3-jdk-14
+  image: maven:3.8.1-openjdk-16-slim
   stage: build
   tags:
     - docker

java-parent/pom.xml

@@ -10,7 +10,7 @@
   <packaging>pom</packaging>
 
   <properties>
-    <java.version>14</java.version>
+    <java.version>16</java.version>
 
     <junit.version>5.7.0</junit.version>
     <assertj.version>3.18.1</assertj.version>
@@ -18,7 +18,7 @@
 
     <surefire-plugin.version>3.0.0-M5</surefire-plugin.version>
     <compiler-plugin.version>3.8.1</compiler-plugin.version>
-    <jacoco.version>0.8.5</jacoco.version>
+    <jacoco.version>0.8.6</jacoco.version>
   </properties>
 
   <dependencies>