FindBugs' full :annotation instead of :jsr305 artifact sub-set

FindBugs' full :annotation instead of :jsr305 artifact sub-set

This will require that all downstream projects first switch their
<dependency><groupId>com.google.code.findbugs from <artifactId>jsr305 to
<artifactId>annotations in all pom.xml.  They will NOT have to adapt any
code, because the actual Java types are exactly the same (just from a
different Maven artefact).

see also discussion in https://git.opendaylight.org/gerrit/#/c/46914/

Change-Id: Idedc9203f99dd012f10945f2f8f69c88e5f541a2
Signed-off-by: Michael Vorburger <vorburger@redhat.com>