cheets_xTS: Fix generator error introduced by the prerequisite generation.

BUG=b:131440102
TEST=generate_controlfiles.py

Change-Id: I0cd6f4e543e513ed22bbe1ed017ee33c36d06a46
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2029554
Tested-by: Kazuhiro Inaba <kinaba@chromium.org>
Auto-Submit: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Ian Lee <ianrlee@google.com>
Commit-Queue: Kazuhiro Inaba <kinaba@chromium.org>
diff --git a/server/cros/tradefed/generate_controlfiles_CTS_Instant.py b/server/cros/tradefed/generate_controlfiles_CTS_Instant.py
index 631d4c1..c1a3ff8 100755
--- a/server/cros/tradefed/generate_controlfiles_CTS_Instant.py
+++ b/server/cros/tradefed/generate_controlfiles_CTS_Instant.py
@@ -175,6 +175,7 @@
 
 CONFIG['EXTRA_ARTIFACTS'] = {}
 
+CONFIG['PREREQUISITES'] = {}
 
 if __name__ == '__main__':
         main(CONFIG)
diff --git a/server/cros/tradefed/generate_controlfiles_CTS_N.py b/server/cros/tradefed/generate_controlfiles_CTS_N.py
index 4bf1be5..cb1597b 100755
--- a/server/cros/tradefed/generate_controlfiles_CTS_N.py
+++ b/server/cros/tradefed/generate_controlfiles_CTS_N.py
@@ -345,6 +345,8 @@
 CONFIG['EXTRA_ARTIFACTS'] = {
 }
 
+CONFIG['PREREQUISITES'] = {
+}
 
 from generate_controlfiles_common import main
 
diff --git a/server/cros/tradefed/generate_controlfiles_CTS_Q.py b/server/cros/tradefed/generate_controlfiles_CTS_Q.py
index 6012c88..df3dbf0 100755
--- a/server/cros/tradefed/generate_controlfiles_CTS_Q.py
+++ b/server/cros/tradefed/generate_controlfiles_CTS_Q.py
@@ -444,7 +444,7 @@
 CONFIG['EXTRA_ATTRIBUTES'] = {}
 
 CONFIG['EXTRA_ARTIFACTS'] = {}
-
+CONFIG['PREREQUISITES'] = {}
 
 from generate_controlfiles_common import main
 
diff --git a/server/cros/tradefed/generate_controlfiles_GTS_N.py b/server/cros/tradefed/generate_controlfiles_GTS_N.py
index 526d5ab..811aa9a 100755
--- a/server/cros/tradefed/generate_controlfiles_GTS_N.py
+++ b/server/cros/tradefed/generate_controlfiles_GTS_N.py
@@ -140,7 +140,7 @@
     'tradefed-run-collect-tests-only-internal': ['suite:arc-gts'],
 }
 CONFIG['EXTRA_ARTIFACTS'] = {}
-
+CONFIG['PREREQUISITES'] = {}
 
 from generate_controlfiles_common import main
 
diff --git a/server/cros/tradefed/generate_controlfiles_VTS.py b/server/cros/tradefed/generate_controlfiles_VTS.py
index 044f73d..94dbad6 100755
--- a/server/cros/tradefed/generate_controlfiles_VTS.py
+++ b/server/cros/tradefed/generate_controlfiles_VTS.py
@@ -124,7 +124,7 @@
 }
 
 CONFIG['EXTRA_ARTIFACTS'] = {}
-
+CONFIG['PREREQUISITES'] = {}
 
 if __name__ == '__main__':
         main(CONFIG)