Merge pull request #3038 from aws/joviegas/fix_jdk8_buildfailure

Revert japicmp upgrade since Jdk8 release builds were failing which were using aws/codebuild/java:openjdk-8 images

Author: joviegas

pom.xml

@@ -157,7 +157,7 @@
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
         <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
         <build-helper-maven-plugin.version>3.3.0</build-helper-maven-plugin.version>
-        <japicmp-maven-plugin.version>0.21.2</japicmp-maven-plugin.version>
+        <japicmp-maven-plugin.version>0.15.6</japicmp-maven-plugin.version>
         <versions-maven-plugin.version>2.13.0</versions-maven-plugin.version>
         <maven-archetype-plugin.version>3.2.1</maven-archetype-plugin.version>
         <!-- Whenever we update maven-wrapper-plugin version, we need to run mvn wrapper:wrapper to update the Maven Wrapper files(mvnw, .maven and mvnw.cmd) -->