New test models only have the first row for constant values

[enekomartinmartinez]

Hi,
The newest test I added only have first row for constant values output.tab is like:

Time	FINAL TIME	INITIAL TIME	oscilating var	constant var	SAVEPER	TIME STEP
0	2	0	0.841471	100	1	1
1			0.410781		1
2			0.893855		1

is this okay for everyone, I solved this issue in PySD adding the following lines to repeat the value over the rows:

# if for Vensim outputs where constant values are only in the first row
if np.isnan(expected[col].values[1:]).all():
    expected[col] = expected[col].values[0]

is it possible to do something similar in the other repositories that are using this repo? This way we avoid post-processing output.tab files and make easier contributing with new test models.

[JamesPHoughton]

@ivan-perl, will this work with your SDE test setup?