Update Maven Javadoc plugin from 3.0.0-M1 to 3.0.0.
<pmd.plugin.version>3.8</pmd.plugin.version>
<findbugs.plugin.version>3.0.5</findbugs.plugin.version>
<changes.plugin.version>2.12.1</changes.plugin.version>
- <javadoc.plugin.version>3.0.0-M1</javadoc.plugin.version>
+ <javadoc.plugin.version>3.0.0</javadoc.plugin.version>
<!-- surefire.plugin.version 2.18 yields http://jira.codehaus.org/browse/SUREFIRE-1121, which is fixed in 2.18.1 -->
<!-- surefire.plugin.version 2.19 yields https://issues.apache.org/jira/browse/SUREFIRE-1193. -->
<!-- all versions after 2.13 yield https://issues.apache.org/jira/browse/SUREFIRE-720 -->
