Bulk Operation

PM-1501 update schema for job args s.t. types can be strings and scalars

PM-1501 prefer catalog entries for SC, RC and TC in the DAX over everything else

PM-1501 Update DAXParser Factory to load the right parser based on content of input dax file

PM-1501 update "type" field options in the AbstractJob schema to be "job", "pegasusWorkflow", and "condorWorkflow"

PM-1501 update schema for stdin, stdout, stderr in jobs to s.t only lfn is used

PM-1501 for job arguments, files should be added as a strings

PM-1501 flatten out the uses section. remove the extra file property aggregation

PM-1501 in the python api, write out yml in order