Replace parameter and value using the configuration

[changliao1025]

The configuration file cannot contain too many parameters for practice. Instead, one or more separated files may be used for parameters.

[changliao1025]

Initial value can be updated independently. Or it can be extracted from an existing case.

[changliao1025]

            for j in range(oSwat.nParameter_watershed):
                    pPara = oSwat.aParameter_watershed[j]
                    sName1 = pPara.sName
                    if sName.lower() == sName1.lower():
                        #replace
                        oSwat.aParameter_watershed[j].dValue_current = dValue
                        iFlag_found = 1
                        break