How to replace "contenttable" class of typo3 RTE table

In order to remove "contettable" class from tables created through RTE (htmlarea extension) it is required to add the following lines of code in TSref (Setup):

lib.parseFunc_RTE{
 externalBlocks{
 table.stdWrap.HTMLparser.tags.table.fixAttrib.class { 
##Add a class for table using "default" 
default = table table-striped 
always = 1 
}
}
}