CLN: add a different locale for non slow tests
TST/ENH: add locale testing utils
CLN: remove unnecessary stuff
TST: Only test Google Finance in the en_US.UTF-8 locale
TST: enable test of locales with a diff locale

Enable the it_CH.UTF-8 locale via a perl regex and replace so that we can test
the new utilities for reporting locale with something other that the current
locale.
TST: only test Google Finance if there is at least one US English locale