Fixed test name resolution for session fixtures + widgets fixes

[abalakh]

• Added module org and user
• fixed test name resolution for session fixtures
• small bugfixes for widgets HorizontalNavigation and Search

pytest tests/foreman/ui_airgun/ (dev|✔)
============================= test session starts ==============================
platform darwin -- Python 3.6.4, pytest-3.3.2, py-1.5.2, pluggy-0.6.0
shared_function enabled - OFF - scope:  - storage: file
rootdir: /Users/andrii/workspace/robottelo, inifile:
plugins: wait-for-1.0.9, xdist-1.22.0, services-1.2.1, mock-1.6.3, forked-0.2
collected 6 items
2018-02-14 14:23:15 - conftest - DEBUG - BZ deselect is disabled in settings

tests/foreman/ui_airgun/test_architecture.py ..                          [ 33%]
tests/foreman/ui_airgun/test_os.py ....                                  [100%]

========================== 6 passed in 171.05 seconds ==========================