Add Chimera Configuration File

You can read about the file: https://hysds-core.atlassian.net/wiki/spaces/HYS/pages/564396573

Decide on adaptation script names for the 3 Chimera steps.
e.g. In NISAR, under the adaptation directory, we created the following:
1. precondition_functions.py - The preconditions adaptation script containing a class named NisarPreConditionFunctions which is a sub-class of PreConditionFunctions.
2. nisar_pge_job_submitter.py - The PGE job submission adaptation script containing a class named NisarPgeJobSubmitter which is a sub-class of PgeJobSubmitter.
3. postprocess_functions.py - The PGE job submission adaptation script containing a class named NisarPostProcessFunctions which is a sub-class of PostProcessFunctions.

2. Then create a file named chimera_config.yaml in the configs directory following the template provided in https://hysds-core.atlassian.net/wiki/spaces/HYS/pages/564396573
e.g for the NISAR chimera_config.yaml is as follows:

 module_path is a path to where the given class can be found

# This tells Chimera how to load in the precondition functions class in order to do the input preprocessor step.
# class_name must be a subclass of Chimera's PreConditionFunctions class.
preprocessor:
  module_path: nisar_chimera.precondition_functions
  class_name: NisarPreConditionFunctions

# This tells Chimera how to load in the job submitter class in order to do the PGE job submission step.
# class_name must be a subclass of Chimera's PgeJobSubmitter class.
job_submitter:
  module_path: nisar_chimera.nisar_pge_job_submitter
  class_name: NisarPgeJobSubmitter

# This tells Chimera how to load in the post processor class in order to run any custom post processing.
# class_name must be a subclass of Chimera's PostProcessFunctions class.
postprocessor:
  module_path: nisar_chimera.postprocess_functions
  class_name: NisarPostProcessFunctions