Fixup.

tests/e2e_tests/test_beremiz.py

@@ -4,6 +4,9 @@ import random
 from opcua import Client
 import slapos.testing.e2e as e2e
 
+# the OPC UA node of relay0 at I2C0 slave
+OPC_UA_IDENTIFIER = "ns=1;s=i2c0.relay0"
+
 class BeremizTest(e2e.EndToEndTestCase):
   """
   This tests check proper functioning with real instances (inside SlapOS cloud)
@@ -80,7 +83,6 @@ class BeremizTest(e2e.EndToEndTestCase):
     """
     NUMBER_OF_CHECKS = 100
     TIMEOUT = 3
-    OPC_UA_IDENTIFIER = "ns=1;s=i2c0.relay0"
 
     # give it some time for services(runtime & coupler) to warm up, connect and run
     time.sleep(30)