[NEXUS-6070] Catch throwables (to include also Errors) while rendering status/description of a capability

Log throwable at warn level

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge pull request #211 from sonatype/NEXUS-6070-catch-throwables-on-capab-resource

REVIEW: [NEXUS-6070] Catch throwables (to include also Errors) while rendering status/description of a capability