Corrected exec() error

Change-Id: Ibcaea22a6d23045ea5a9be591f3e9d71c0cce3dd
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/gen_plug_in_utils.py b/lib/gen_plug_in_utils.py
index ab0b1ff..6913b42 100755
--- a/lib/gen_plug_in_utils.py
+++ b/lib/gen_plug_in_utils.py
@@ -143,7 +143,7 @@
             cmd_buf += ", 0)"
         else:
             cmd_buf += ")"
-        exec(cmd_buf)
+        exec(cmd_buf) in globals(), locals()
     # Register password values to prevent printing them out.  Any plug var whose name ends in PASSWORD will
     # be registered.
     password_vals = {k: v for (k, v) in plug_var_dict.items()