Rename torch_dist_role ``script_args`` to ``args``, ``script_envs`` t…

…o ``env`` (pytorch#64)

Summary:
Pull Request resolved: pytorch#64

Rename torch_dist_role ``script_args`` to ``args``, ``script_envs`` to ``env``

Reviewed By: kiukchung

Differential Revision: D29152204

fbshipit-source-id: a0a234d7b10c86dc073504c8633b692524df8cb8

Move test_components to a separate target (pytorch#61)

Summary:
Pull Request resolved: pytorch#61

Move test_components to a separate target

Reviewed By: kiukchung

Differential Revision: D29154499

fbshipit-source-id: 0479c36252bea7c3fa1cacaaa88a6e10faf2bf14