Bruno Litman

Do not advertise at startup if advertiseFrequency <=0 - Related to changes in WFLY-5204

WFCORE-760: Validate that the "category" attribute for a logger is not an empty string. Without this fix, such a config fails to start and throws a StringOutOfBoundsException. Now instead, it fails with an invalidAttributeValue error which generates a more useful error message as follows: ParseError at [row,col]:[1,5167] Message: WFLYCTL0106: Invalid value '' for attribute 'category'