dded rc type for parsing files
read_dft_abstract_model uses more power of the RC option

::octopus::read_dft_abstract_model is not seraching for instances
anymore but rather uses the module feature of the standard
read_dft_abstract_model
get_atribute needs the third argument
Simple check for rc_attribute.txt format
ignore empty lines in rc_attributes.txt.

Removed alsa the clp_treat_errors_as_warnings since it is not used to
continue on error