Gin Config Issue - Get Histogram Path

[s2t2]

This gin config seems to be invalid / throwing an error.

sbsim/smart_control/configs/resources/sb1/train_sim_configs/sim_config_1_day.gin

Line 16 in 67c5bb0

controller_reader.ProtoReader.input_dir = @get_histogram_path()

ValueError: No configurable matching reference '@get_histogram_path()'.
  In file "/usr/local/google/home/mjrossetti/projects/sbsim/smart_control/utils/../../smart_control/configs/resources/sb1/train_sim_configs/sim_config_1_day.gin", line 16
        controller_reader.ProtoReader.input_dir = @get_histogram_path()

[s2t2]

There is a get_histogram_path function defined in "smart_control/reinforcement_learning/utils/config.py".

Adding this to the populate starter buffer script will resolve the error:

# pylint:disable-next=unused-import
from smart_control.reinforcement_learning.utils.config import get_histogram_path  # isort:skip