REFAC : Python src refactoring (part 1)

python_src/lib/.pylintrc

python_src/lib/__init__.py

python_src/lib/diapOTB.py

python_src/lib/diapOTB_S1IW.py

python_src/lib/processing/DInSAR.py

python_src/lib/processing/DiapOTBProcessingFactory.py

python_src/lib/processing/Ground.py

python_src/lib/processing/PostProcessing.py

python_src/lib/processing/PreProcessing.py

python_src/lib/processing/__init__.py

python_src/lib/processing/core/ApplicationWrapper.py

python_src/lib/processing/core/ConfigFile.py

python_src/lib/processing/core/DiapOTBEnums.py

python_src/lib/processing/core/DiapOTBExceptions.py

python_src/lib/processing/core/DiapOTBProcessing.py

python_src/lib/processing/core/Utils.py

python_src/lib/processing/core/__init__.py

python_src/old/SAR_MultiSlc.py

python_src/old/SAR_MultiSlc_IW.py

python_src/old/coRegistation_S1IW.py