test_gem_remote_fetcher.rb: restore environment variables
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_gem_remote_fetcher.rb: restore environment variables
restore environment variables fo http proxy, to get rid of sporadic
warnings from URI::Generic#find_proxy.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e