[NEXUS-5953] Remove @MAnaged and LoadOnStart face as they are problematic

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge pull request #14 from sonatype/NEXUS-5953-remove-eventbus-managed

REVIEW: [NEXUS-5953] Remove @Managed and LoadOnStart face as they are problematic