jdk8 enhancements

Updated jacoco to support jdk8
Skip findbugs for now as it fails with jdk8
Note: javadocs now strict in jdk8.   Either fix any that error or add
the following configuration to javadoc plugin.  I didn't do this
currently as I had a small number to fix.
<configuration>
<additionalparam>-Xdoclint:none</additionalparam>
</configuration>