bug: recipes for equilibration (ColdMezeRecipe) and for production (HotMezeRecipe) should be separated

[jasmin-guven]

meze/examples/heat_meze.py

Line 23 in ad7274c

recipe=ColdMezeRecipe(**json_recipe)

Both recipes share key words (e.g. runtime, dt) which need to be set separately, meaning that the JSON file should be separated into cold_meze_recipe_model_0.json and hot_meze_recipe_model_0.json.