Hack: Hardcode base href for CBT

Need absolute URL for IE - for now we hardcode to beta site

LP#15771745
Merge pull request #31 from NationalMuseumofDenmark/FrontendSprint2#15771745

Hack: Hardcode base href for CBT
Merge pull request #32 from NationalMuseumofDenmark/master

Update testing with base href