JCLOUDS-546: Remove Javadoc @author annotations

Annotations removed with:

find -name \*.java | xargs sed -i /@author/d

Empty Javadoc removed with multiple iterations of:

find -name \*.java | xargs sed -i -z 's/ \*\n \*\// \*\//'
find -name \*.java | xargs sed -i -z 's/ \* \n \*\// \*\//'
find -name \*.java | xargs sed -i -z 's/\/\*\*\n \*\/\n//'
JCLOUDS-546: Enforce no Javadoc @author annotation
Upgrade to findbugs-maven-plugin 2.5.4

This also upgrades FindBugs to 2.0.3.  Notably this improves
compatibility with Guava constructs.  Changelogs:

https://jira.codehaus.org/secure/ReleaseNote.jspa?projectId=11701&version=19833
http://findbugs.sourceforge.net/Changes.html
Adding a test to check for JCLOUDS-278

Contributed by Bill Branan.