Refactoring and new tests
Refactoring of create_input_xml() method
Added unit tests for MXPipelineInput, AutoPROC_pipeline, EDNA_proc_pipeline and XIA2_DIALS_pipeline
Refactoring of create_input_xml() method
Added unit tests for MXPipelineInput, AutoPROC_pipeline, EDNA_proc_pipeline and XIA2_DIALS_pipeline