Rename zuul-launcher to zuul-executor

To avoid confusion with nodepool-launcher, we've decided to rename
zuul-launcher to zuul-executor.

Change-Id: I7d03cf0f0093400f4ba2e4beb1c92694224a3e8c
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/TESTING.rst b/TESTING.rst
index d2cd4c1..0786ebf 100644
--- a/TESTING.rst
+++ b/TESTING.rst
@@ -64,12 +64,12 @@
 
 For example, to *run the basic Zuul test*::
 
-  tox -e py27 -- tests.unit.test_scheduler.TestScheduler.test_jobs_launched
+  tox -e py27 -- tests.unit.test_scheduler.TestScheduler.test_jobs_executed
 
 To *run one test in the foreground* (after previously having run tox
 to set up the virtualenv)::
 
-  .tox/py27/bin/python -m testtools.run tests.unit.test_scheduler.TestScheduler.test_jobs_launched
+  .tox/py27/bin/python -m testtools.run tests.unit.test_scheduler.TestScheduler.test_jobs_executed
 
 List Failing Tests
 ------------------