tests: travis cache removal

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
citationformatter: utf-8 special characters fix

* Adds the utf-8 encoding in HTTP request.

Reviewed-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>
base: bundle compilation fix

* Fixes issue with asset building.

Reviewed-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>