tests: allow override of PAGE_LAYOUT_LOCALES
tests: allow override of PAGE_LAYOUT_LOCALES

DOCKER_RUN_ARGUMENTS='-e PAGE_LAYOUT_LOCALES=en_US' \
  ./bin/dev-shell ./bin/run-test -v tests/pages-layout

heartsucker/securedrop,conorsch/securedrop,conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,ehartsuyker/securedrop