Removed references to `omaciel`.

Since we've moved the project to the `SatelliteQE` organization, I have
updated references to `omaciel/robottelo`.
Merge pull request #1434 from omaciel/update-index

Removed references to `omaciel`.
Fix a name clash

Rename class attribute `Media.path` to `Media.path_`. This prevents the
attribute from conflicting with the method of the same name.

Fix #1429.