Fixup get_currency_name test
Fixup get_currency_name test

This test failed in environments where no default locale
can be determined; make the test deterministic and add
additional test for plurality.

Signed-off-by: James Page <1e519b4fa2a9784a8a60ab7dc02025b68064a915@ubuntu.com>

iamshubh22/babel,gutsy/babel,julen/babel,hanteng/babel,moreati/babel,jmagnusson/babel,prmtl/babel,lepistone/babel,iamshubh22/babel,xlevus/babel,moreati/babel,jmagnusson/babel,jmagnusson/babel,srisankethu/babel,mbirtwell/babel,julen/babel,prmtl/babel,python-babel/babel,skybon/babel,mitsuhiko/babel,KIT-XXI/babel,upman/babel,felixonmars/babel,skybon/babel,mitsuhiko/babel,st4lk/babel,st4lk/babel,prmtl/babel,jespino/babel,hanteng/babel,upman/babel,mbirtwell/babel,KIT-XXI/babel,julen/babel,xlevus/babel,mbirtwell/babel,hanteng/babel,mitsuhiko/babel,lepistone/babel,lepistone/babel,KIT-XXI/babel,st4lk/babel,srisankethu/babel,upman/babel,skybon/babel,felixonmars/babel,jespino/babel,xlevus/babel,iamshubh22/babel,felixonmars/babel,python-babel/babel,moreati/babel,gutsy/babel,srisankethu/babel,gutsy/babel