Add --debug option to ansible-test.

test/runner/lib/ansible_util.py

@@ -32,4 +32,7 @@ def ansible_environment(args):
 
     env.update(ansible)
 
+    if args.debug:
+        env.update(dict(ANSIBLE_DEBUG='true'))
+
     return env

test/runner/lib/util.py

@@ -416,6 +416,7 @@ class CommonConfig(object):
         self.color = args.color  # type: bool
         self.explain = args.explain  # type: bool
         self.verbosity = args.verbosity  # type: int
+        self.debug = args.debug  # type: bool
 
 
 class EnvironmentConfig(CommonConfig):