[platform_tests] fix interfaces_wait_time not expected problem (sonic…

…-net#11939)

Interfaces_wait_time can be a custom value, but in function the old value was used, because the function default value is initialized when custom value is applied. Fix the bug.

tests/platform_tests/test_reboot.py

@@ -96,7 +96,7 @@ def reboot_and_check(localhost, dut, interfaces, xcvr_skip_list,
 
 
 def check_interfaces_and_services(dut, interfaces, xcvr_skip_list,
-                                  interfaces_wait_time=MAX_WAIT_TIME_FOR_INTERFACES, reboot_type=None):
+                                  interfaces_wait_time=None, reboot_type=None):
     """
     Perform a further check after reboot-cause, including transceiver status, interface status
     @param localhost: The Localhost object.
@@ -106,6 +106,9 @@ def check_interfaces_and_services(dut, interfaces, xcvr_skip_list,
     logging.info("Wait until all critical services are fully started")
     wait_critical_processes(dut)
 
+    if interfaces_wait_time is None:
+        interfaces_wait_time = MAX_WAIT_TIME_FOR_INTERFACES
+
     if dut.is_supervisor_node():
         logging.info("skipping interfaces related check for supervisor")
     else: