fixed warnings and errors (initial)
Createt LoggerFactory
Improved JavaDoc.
Upgrade to latest LTS release 1.509 (anlysis-pom 1.43).
Reverted to analysis-pom 1.42.
Added global configuration for all static code analysis plug-ins.
Merge remote-tracking branch 'upstream/master'
LoggerFactory implementiert

Alle direkten Instanzierungen von PluginLogger durch Factory-Klasse
ersetzt.

Test für LoggerFactory erstellt
Javadoc angepasst
Merge pull request #16 from Schlangguru/LoggerFactory_QuietMode

[FIXED JENKINS-15246] Added Logger factory quiet mode.