run-tests: move killdaemons into Test.run() killdaemons() was the only part of runone() looking at env variables. We move killdaemons() into Test.run() to enable us to fully move env into Test.

run-tests: move replacements and port management into Test replacements and ports are really implementation details of a Test. They have been moved to instance variables.

run-tests: move createhgrc() call into Test.run() createhgrc() is an implementation detail of how tests are run. It makes sense to move it into Test.run(). Note that this will cause the test execution time to include the creation of hgrc. The author does not believe this is a significant change worth worrying about.

run-tests: move createenv() into Test createenv() is consulting lots of test-specific variables. It makes sense to attach it to the Test class.

run-tests: move replacements generation into Test The API is a bit funky. Things will look better once all state is captured in Test.

run-tests: move testtmp into Test class This patch starts the process of moving test-specific variables into the Test class. The ultimate goal is to be able to instantiate a Test with minimal arguments and to call run() on it without too much thinking. This will make it much easier to run tests from other contexts. It will also enable things like running a test multiple times.