[NEXUS-6057] Return null in case of a problem accessing yum config during status rendering

Calling into super.status() triggered a stack overflow

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Use try with resources in yum metadata status rendering

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
NEXUS-6074: Converted MAC event inspector into subscriber

And fixed log spam.
[NEXUS-6075] Use RepositoryConfigurationUpdatedEvent instead of RepositoryEventLocalStatusChanged in RepositoryLocalStatusCondition

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge pull request #212 from sonatype/NEXUS-6057-stack-overflow-on-yum-capabilities

REVIEW: [NEXUS-6057] Return null in case of a problem accessing yum config during status rendering
NEXUS-6074: Clarified method names

As "handle" was too generic.
Merge pull request #213 from sonatype/NEXUS-6074-mac-event-subscriber

NEXUS-6074: Converted MAC event inspector into subscriber
Deprecated AbstractLoggingComponent in favor of goodies.
Merge pull request #214 from sonatype/fix-local-status-changed-capab-condition

REVIEW: [NEXUS-6075] Use RepositoryConfigurationUpdatedEvent instead of RepositoryEventLocalStatusChanged in RepositoryLocalStatusCondition
[NEXUS-6070] Refactor internal capability reference statuses

Also updated logging calls to use var args

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge remote-tracking branch 'origin/master' into NEXUS-6070-failure-during-capab-load