Update unit tests to work with the new setup

[JesperBrink]

We have changed a lot of the way that we work with the code, but we havn't updated our unit tests to match that. When running our unit tests the following tests fails:

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ERROR: test_add_requirement (test.test_recipe.TestRecipeClass)
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Traceback (most recent call last):
  File "/Users/jesperbrink/Desktop/work/bioconda_recipe_gen/test/test_recipe.py", line 64, in test_add_requirement
    recipe = Recipe("test/files_for_testing/kallisto_recipe_with_hdf5.txt")
TypeError: __init__() missing 1 required positional argument: 'version'

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ERROR: test_initialization_method (test.test_recipe.TestRecipeClass)
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Traceback (most recent call last):
  File "/Users/jesperbrink/Desktop/work/bioconda_recipe_gen/test/test_recipe.py", line 35, in test_initialization_method
    recipe = Recipe("test/files_for_testing/full_kallisto_recipe.yaml")
TypeError: __init__() missing 1 required positional argument: 'version'

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ERROR: test_write_recipe_to_meta_file (test.test_recipe.TestRecipeClass)
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Traceback (most recent call last):
  File "/Users/jesperbrink/Desktop/work/bioconda_recipe_gen/test/test_recipe.py", line 46, in test_write_recipe_to_meta_file
    recipe = Recipe(temp_file_path)
TypeError: __init__() missing 1 required positional argument: 'version'

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ERROR: test_exit_codes_is_success_for_kallisto (test.test_build.TestMiniIterativeBuild)
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Traceback (most recent call last):
  File "/Users/jesperbrink/Desktop/work/bioconda_recipe_gen/test/test_build.py", line 40, in test_exit_codes_is_success_for_kallisto
    proc = build.mini_iterative_build()
TypeError: mini_iterative_build() missing 1 required positional argument: 'recipe'

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It could be nice to have these tests updated, such that the unit tests doesn't crash because of incorrect use of functions.