add design_parameters column to designs table
add design_parameters to create_design method, added tests for this
validate design_parameters data is json data, add method to design resultset to parse the json design parameter data and return a hash
add new gibson oligo types to design_oligo_types table
add new design type to fixture data
add new design oligo types to fixture data
remove log4perl easy_init calls that were possibly override the LIMS2 logging setup from our config files