Allow to explicitly specify Thread Names for Comala Publishing

Allow to explicitly specify the names of threads for which the projectdoc Toolbox should skip event handling.

Setting these names is useful if the event processing produces redundant work on incomplete documents. In case this property is specified the refresh process is required to be started manually after a successful publishing.

The system property de.smartics.projectdoc.integration.thread.names accepts a comma-separated list of names to match with thread names. This may also help with other tools that process Confluence pages where the processing of events by the projectdoc Toolbox should be postponed due to performance reasons.