Component now provides Omniture tracker

The ad server will need to provide the code in 2
variables:

- inlineMicCode
- mpuMicCode
Removed old Omniture tracking code from Travel component.

Omniture code works now.
Reinstate article inline test & switches
Reinstate inline article tests
Merge branch 'master' into article-commercial-tests
Use alpha1 and alpha2 OAS servers per variant
Fix a bad merge for RightPopular tests
Correct file name in AB test module
Tests off by default
Fix inline slots to a maximum width
Changed test expiry date. Updated paths.
Merge pull request #2658 from guardian/article-commercial-tests

Article commercial tests