Reapply log customisers when logback context is reset

e.g. logback files changed or when log manager configure method had been called

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Reapply customisations when loggers are reset

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Install, if not already in place, the JUL propagator fix every time level will be set to null

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

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge pull request #228 from sonatype/fix-logback-autorefresh

REVIEW: Reapply log customisers when logback context is reset