fix benchmark exit status (#1850)

Fix exit status

Authors:
  - Joseph Nke (https://github.com/jnke2016)

Approvers:
  - Brad Rees (https://github.com/BradReesWork)
  - Rick Ratzel (https://github.com/rlratzel)

URL: #1850

benchmarks/python_e2e/main.py

@@ -110,7 +110,7 @@ def run(algos,
         funcs.teardown(*setup_objs)
         log("done.")
 
-    return success is True
+    return 0 if success else 1
 
 
 if __name__ == "__main__":