Javadoc comment of configuration properties should be trimmed after extraction

[gsmet]

The content of shamrock-descriptions.properties for Undertow is currently the following:

shamrock.http.port=\ The HTTP port\n
shamrock.http.workerThreads=\ The number of worker threads used for blocking tasks, this will be automatically set to a reasonable value\n based on the number of CPU core if it is not provided\n
shamrock.http.ioThreads=\ The number if IO threads used to perform IO. This will be automatically set to a reasonable value based on\n the number of CPU cores if it is not provided\n
shamrock.http.host=\ The HTTP host\n

We should trim the Javadoc to avoid the \ at the beginning and the \n at the end.