Fix lgtm error and fix load_db config function calls.

Signed-off-by: Suvarna Meenakshi <sumeenak@microsoft.com>

src/sonic-config-engine/portconfig.py

@@ -8,7 +8,6 @@
     from swsscommon import swsscommon
     from sonic_py_common import device_info
     from sonic_py_common.multi_asic import get_asic_id_from_name
-    from sonic_py_common import multi_asic
 except ImportError as e:
     raise ImportError("%s - required module not found" % str(e))
 

src/sonic-config-engine/sonic-cfggen

@@ -32,7 +32,7 @@ from functools import partial
 from minigraph import minigraph_encoder, parse_xml, parse_device_desc_xml, parse_asic_sub_role, parse_asic_switch_type
 from portconfig import get_port_config, get_breakout_mode
 from redis_bcc import RedisBytecodeCache
-from sonic_py_common.multi_asic import get_asic_id_from_name, get_asic_device_id
+from sonic_py_common.multi_asic import get_asic_id_from_name, get_asic_device_id, is_multi_asic
 from sonic_py_common import device_info
 from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector, SonicDBConfig, ConfigDBPipeConnector
 
@@ -310,11 +310,11 @@ def main():
                              }
                           })
     # load db config
-    if not swsscommon.SonicDBConfig.isInit():
-        if multi_asic.is_multi_asic():
-            swsscommon.SonicDBConfig.load_sonic_global_db_config(namespace=asic_name)
+    if not SonicDBConfig.isInit():
+        if is_multi_asic():
+            SonicDBConfig.load_sonic_global_db_config(namespace=asic_name)
         else:
-            swsscommon.SonicDBConfig.load_sonic_db_config()
+            SonicDBConfig.load_sonic_db_config()
     if hwsku is not None:
         hardware_data = {'DEVICE_METADATA': {'localhost': {
             'hwsku': hwsku