[galaxy-dev] Note about running functional tests.

Dear Galaxy admins, As of 10408:6822f41bc9bb stable/10409:2ca0b65d5005 default, a bug has been fixed where running functional tests could overwrite some files in your Galaxy path. If you intend to run functional tests, it is recommended to update to the relevant revision on the branch you are running. Additionally, it is not recommended to run functional tests on a production instance, since the test suite alters a number of configuration settings on the fly, with the result being that it is not a reliable test of the exact production environment, which may give misleading results. -- --Dave B.