More test isolation
More test isolation

Towards #361. (Possibly even the very last one!) Fixes:
    spec/models/xapian_spec.rb spec/integration/search_request_spec.rb

andreicristianpetcu/alaveteli,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli_old,andreicristianpetcu/alaveteli,Br3nda/alaveteli,4bic/alaveteli,4bic/alaveteli,hasadna/alaveteli,10layer/alaveteli,Br3nda/alaveteli,4bic/alaveteli,sarhane/alaveteli-test,TEDICpy/QueremoSaber,sarhane/alaveteli-test,Br3nda/alaveteli,hasadna/alaveteli,obshtestvo/alaveteli-bulgaria,sarhane/alaveteli-test,andreicristianpetcu/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli_old,hasadna/alaveteli,nzherald/alaveteli,datauy/alaveteli,petterreinholdtsen/alaveteli,4bic/alaveteli,petterreinholdtsen/alaveteli,datauy/alaveteli,obshtestvo/alaveteli-bulgaria,codeforcroatia/alaveteli,obshtestvo/alaveteli-bulgaria,nzherald/alaveteli,10layer/alaveteli,codeforcroatia/alaveteli,andreicristianpetcu/alaveteli_old,datauy/alaveteli,4bic/alaveteli,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli,TEDICpy/QueremoSaber,nzherald/alaveteli,nzherald/alaveteli,TEDICpy/QueremoSaber,sarhane/alaveteli-test,TEDICpy/QueremoSaber,hasadna/alaveteli,andreicristianpetcu/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,nzherald/alaveteli,codeforcroatia/alaveteli,petterreinholdtsen/alaveteli,hasadna/alaveteli,hasadna/alaveteli,10layer/alaveteli,codeforcroatia/alaveteli,andreicristianpetcu/alaveteli_old,Br3nda/alaveteli,TEDICpy/QueremoSaber,petterreinholdtsen/alaveteli