added docstring and try block for fetch_input method of the base runnable
added docstring and try block for fetch_input method of the base
runnable
imperial-genomics-facility/data-management-python,imperial-genomics-facility/data-management-python,imperial-genomics-facility/data-management-python,imperial-genomics-facility/data-management-python,imperial-genomics-facility/data-management-python