[Celestica] Ensure concrete platform API classes call base class initializer (#6852)

In preparation for the merging of Azure/sonic-platform-common#173, which properly defines class and instance members in the Platform API base classes.

It is proper object-oriented methodology to call the base class initializer, even if it is only the default initializer. This also future-proofs the potential addition of custom initializers in the base classes down the road.

device/celestica/x86_64-cel_e1031-r0/sonic_platform/thermal.py

@@ -25,6 +25,8 @@ class Thermal(ThermalBase):
     SS_CONFIG_PATH = "/usr/share/sonic/device/x86_64-cel_e1031-r0/sensors.conf"
 
     def __init__(self, thermal_index):
+        ThermalBase.__init__(self)
+
         self.index = thermal_index
 
         # Add thermal name

device/celestica/x86_64-cel_e1031-r0/sonic_platform/watchdog.py

@@ -53,6 +53,7 @@ WDT_SYSFS_PATH = "/sys/class/watchdog/"
 class Watchdog(WatchdogBase):
 
     def __init__(self):
+        WatchdogBase.__init__(self)
 
         self.watchdog, self.wdt_main_dev_name = self._get_wdt()
         self.status_path = "/sys/class/watchdog/%s/status" % self.wdt_main_dev_name

device/celestica/x86_64-cel_seastone-r0/sonic_platform/thermal.py

@@ -67,6 +67,7 @@ class Thermal(ThermalBase):
     SS_CONFIG_PATH = "/usr/share/sonic/device/x86_64-cel_seastone-r0/sensors.conf"
 
     def __init__(self, thermal_index, airflow):
+        ThermalBase.__init__(self)
         self.index = thermal_index
         self._api_helper = APIHelper()
         self._airflow = airflow

device/celestica/x86_64-cel_seastone-r0/sonic_platform/watchdog.py

@@ -31,6 +31,8 @@ WDT_COMMON_ERROR = -1
 class Watchdog(WatchdogBase):
 
     def __init__(self):
+        WatchdogBase.__init__(self)
+
         # Init helper
         self._api_helper = APIHelper()
 

device/celestica/x86_64-cel_seastone_2-r0/sonic_platform_config/watchdog.py

@@ -29,6 +29,8 @@ WDT_COMMON_ERROR = -1
 class Watchdog(WatchdogBase):
 
     def __init__(self):
+        WatchdogBase.__init__(self)
+
         self._api_common = Common()
 
         # Init cpld reg path

device/celestica/x86_64-cel_silverstone-r0/sonic_platform/fan.py

@@ -54,6 +54,7 @@ class Fan(FanBase):
     """Platform-specific Fan class"""
 
     def __init__(self, fan_tray_index, fan_index=0, is_psu_fan=False, psu_index=0):
+        FanBase.__init__(self)
         self.fan_index = fan_index
         self.fan_tray_index = fan_tray_index
         self.is_psu_fan = is_psu_fan