Small important fix for print_node_version

Change-Id: I3c3af34cb69e5c1dcb0c554b67ed29b23407db7a
diff --git a/cvp_checks/fixtures/base.py b/cvp_checks/fixtures/base.py
index 8fbac37..f6ad22a 100644
--- a/cvp_checks/fixtures/base.py
+++ b/cvp_checks/fixtures/base.py
@@ -105,5 +105,7 @@
         def write_report():
             print(report_text)
         atexit.register(write_report)
+        yield
     except Exception as e:
         print("print_node_version:: some error occurred: {}".format(e))
+        yield