wrong assert in Chillers.Carnot

[mwetter]

In the initial equation section of Chillers.Carnot, the assert statement

 assert(abs(Buildings.Utilities.Math.Functions.polynomial(
         a=a, x=y)-1) < 0.01, "Efficiency curve is wrong. Need etaPL(y=1)=1.");

should be

 assert(abs(Buildings.Utilities.Math.Functions.polynomial(
         a=a, x=1)-1) < 0.01, "Efficiency curve is wrong. Need etaPL(y=1)=1.");

because the test is for full load, e.g., y=1.