[config][vxlan] fix 'vxlan evpn_nvo add' command error (sonic-net#1511)

* [config][vxlan]fix 'vxlan evpn_nvo add' command error
Remove extra 'CONFIG_DB' argument from db.cfgdb.get_keys()
Signed-off-by: shikenghua <[email protected]>

Author: shikenghua

config/vxlan.py

@@ -47,7 +47,7 @@ def del_vxlan(db, vxlan_name):
     if(vxlan_count > 0):
         ctx.fail("Please delete the EVPN NVO configuration.")  
 
-    vxlan_keys = db.cfgdb.get_keys('CONFIG_DB', "VXLAN_TUNNEL_MAP|*")
+    vxlan_keys = db.cfgdb.get_keys("VXLAN_TUNNEL_MAP|*")
     if not vxlan_keys:
       vxlan_count = 0
     else:
@@ -69,7 +69,7 @@ def vxlan_evpn_nvo():
 def add_vxlan_evpn_nvo(db, nvo_name, vxlan_name):
     """Add NVO"""
     ctx = click.get_current_context()
-    vxlan_keys = db.cfgdb.get_keys('CONFIG_DB', "VXLAN_EVPN_NVO|*")
+    vxlan_keys = db.cfgdb.get_keys("VXLAN_EVPN_NVO|*")
     if not vxlan_keys:
       vxlan_count = 0
     else:

tests/vxlan_test.py

@@ -215,6 +215,11 @@ def test_config_vxlan_add(self):
         print(result.output)
         assert result.exit_code == 0
 
+        result = runner.invoke(config.config.commands["vxlan"].commands["evpn_nvo"].commands["add"], ["nvo1", "vtep1"], obj=db)
+        print(result.exit_code)
+        print(result.output)
+        assert result.exit_code == 0
+
         result = runner.invoke(show.cli.commands["vxlan"].commands["interface"], [])
         print(result.exit_code)
         print(result.output)