Fix wificahos suite NAME attribute

Test metadata enumeration depends on the NAME attribute to name tests /
suites. A handful of test suites were setting a global variable instead.
Fix them.

BUG=chromium:1028257
TEST=None

Change-Id: I44135d12681712714afc01c51b5be5dca08713c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1937975
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Harpreet Grewal <harpreet@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/test_suites/control.wifichaos b/test_suites/control.wifichaos
index 8f04968..e5f0151 100644
--- a/test_suites/control.wifichaos
+++ b/test_suites/control.wifichaos
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 AUTHOR = "Chrome OS Team"
-NAME = "Wifi Chaos Suite"
+NAME = "wifichaos"
 TIME = "SHORT"
 TEST_CATEGORY = "General"
 TEST_CLASS = "suite"
@@ -25,7 +25,7 @@
 from autotest_lib.server.cros.dynamic_suite import dynamic_suite
 
 args_dict['add_experimental'] = True
-args_dict['name'] = 'wifichaos'
+args_dict['name'] = NAME
 args_dict['job'] = job
 
 dynamic_suite.reimage_and_run(**args_dict)