Speed up net_unittests by re-using one FTP test server instance.

I managed to save 30s with this change!

I had to change the interface of the test server a bit. Now the credentials
to be used are passed (optionally) for TestPage request, not in the ctor.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/182031

git-svn-id: http://src.chromium.org/svn/trunk/src/third_party/pyftpdlib@24942 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed