Fix issue487

[jeremykubica]

Closes #487

The node label was being passed to the superclass via kwargs. Since those were also passed to internal function nodes, those nodes were getting the same label. This change passes node label directly so it does not get passed to the function nodes.

[github-actions]

Before [7c1b80b]	After [df00b08]	Ratio	Benchmark (Parameter)
676±30μs	715±20μs	1.06	benchmarks.TimeSuite.time_fnu_to_flam
4.71±0.02ms	4.89±0.08ms	1.04	benchmarks.TimeSuite.time_lightcurve_source
47.5±0.8μs	48.8±0.3μs	1.03	benchmarks.TimeSuite.time_make_new_salt3_model
30.5±0.4μs	31.2±0.3μs	1.02	benchmarks.TimeSuite.time_make_simple_linear_wavelength_model
19.4±0.3ms	19.6±0.4ms	1.01	benchmarks.TimeSuite.time_chained_evaluate_sed
8.76±0.09ms	8.82±0.05ms	1.01	benchmarks.TimeSuite.time_load_passbands
1.04±0.02s	1.05±0.01s	1.01	benchmarks.TimeSuite.time_make_x1_from_hostmass
7.74±0.1ms	7.75±0.3ms	1	benchmarks.TimeSuite.time_apply_white_noise
109±0.9μs	110±0.4μs	1	benchmarks.TimeSuite.time_sample_x0_from_distmod
13.0±0.09μs	13.0±0.1μs	1	benchmarks.TimeSuite.time_sample_x1_from_hostmass

Click here to view all benchmarks.