Don't ignore tests/ directory if meteor.testModule defined.
Don't ignore tests/ directory if meteor.testModule defined.

According to traditional Meteor file loading rules, tests/ directories are
completely ignored: https://guide.meteor.com/structure.html#special-directories

However, if you specify a meteor.testModule in your package.json that
refers to a file inside a tests/ directory, Meteor should permit modules
to be loaded from tests/, as well as any modules that are imported by the
meteor.testModule entry point.

Fixes #9991.

Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor