mod utils.py:get_instance_metadata allowing access to dynamic data
Abstracted some of #1383 & added tests.
Made the tests comply with 80 char lengths per @jamesls's request.
Merge branch 'toastdriven-instance-metadata-urls' into develop

Closes #1406 and #1383.

* toastdriven-instance-metadata-urls:
  Made the tests comply with 80 char lengths per @jamesls's request.
  Abstracted some of #1383 & added tests.
  mod utils.py:get_instance_metadata allowing access to dynamic data