Allow components to participate to logging configuration

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Move nexus loggers configuration to CoreLogConfigurationCustomizer from logback-nexus.xml

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Make possible to unset a logger

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Move configuration logic to logback manager (from logging plugin)

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Add DEFAULT logging level that will reset level to its effective level

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Add UTs for read/write of logback-overrides.xml

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Replace LoggerContributor with LogConfigurationCustomizer in atlas plugin

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Replace LoggerContributor with LogConfigurationCustomizer in wonderland plugin

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Drop LoggerContributor and move configuration logic to log manager

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
JavaDoc

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
On unset set logger level to null instead of reconfiguration

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Add custom level propagator to handle bug in std impl with null level handling
Reload store after add/update/remove of loggers

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge remote-tracking branch 'origin/jul-level-propagator-npe-handler' into logging-improvement
programatically install the jul handler so we can use our custom impl (class-loading issues otherwise)
remove existing jul handler so we can deal with older installations.
added more logging to show what is going on
Merge pull request #207 from sonatype/logging-improvement

REVIEW: Replace LoggerContributor with LogConfigurationCustomizer & move configuration logic to logback log manager
bring back install config files accidentially removed
include nexus.vmoptions for trial installer
Include list of imported plugins in sysinfo
grow vis anchor
Add capability validators for integer/positive integer

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>