Fixes to integration/admin_spec
Fixes to integration/admin_spec

1. Remove useless call to spec_helper’s basic_auth_login method
2. Use Base64.encode64, rather than b64encode which also prints
   the encoded string to standard output.

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