instantiates an object from class of createJunction
createJunction(name, downstream,label,
inflow, delayInflow)a string: the name of junction to be instantiated
an integer: the downstream object code
an integer: a unique number, as label
a vector (optional): a time series of direct inflow rather than flows comming from upstream (cms)
an integer (optional): presenting the time steps to delay direct inflow time series
a list: an object from class createJunction