revert javadoc plugin version for site generation to work
revert javadoc plugin version for site generation to work

hazendaz/findbugs-maven-plugin,lqc/spotbugs-maven-plugin,lqc/spotbugs-maven-plugin,hazendaz/spotbugs-maven-plugin,hazendaz/spotbugs-maven-plugin,gleclaire/findbugs-maven-plugin,hazendaz/spotbugs-maven-plugin,gleclaire/findbugs-maven-plugin,hazendaz/findbugs-maven-plugin,gleclaire/findbugs-maven-plugin,hazendaz/findbugs-maven-plugin,lqc/spotbugs-maven-plugin