VPC-10675 【sdk】eip相关接口补齐

Change-Id: I9754a378d4a5e1505a55fe56bb347668134464e2

Author: caoshuqiang

baidubce/services/eip/eip_client.py

@@ -74,9 +74,10 @@ def create_eip(self, bandwidth_in_mbps, name=None, billing=None,
         """
         body = {
             'name': name,
-            'bandwidthInMbps': bandwidth_in_mbps,
-            'routeType': route_type
+            'bandwidthInMbps': bandwidth_in_mbps
         }
+        if route_type is not None:
+            body['routeType'] = route_type
         if billing is None:
             body['billing'] = {
                 'paymentTiming': 'Postpaid',
@@ -281,9 +282,10 @@ def bind_eip(self, eip, instance_type, instance_id, instance_ip, client_token=No
         """
         body = {
             'instanceType': instance_type,
-            'instanceId': instance_id,
-            'instanceIp': instance_ip
+            'instanceId': instance_id
         }
+        if instance_ip is not None:
+            body['instanceIp'] = instance_ip
         path = utils.append_uri(self._get_path(), eip)
         if client_token is None:
             client_token = self._generate_default_client_token()

baidubce/services/eip/eip_group_client.py

@@ -130,9 +130,10 @@ def create_eip_group(self, eip_count, bandwidth_in_mbps,
         body = {
             'eipCount': eip_count,
             'bandwidthInMbps': bandwidth_in_mbps,
-            'billing': billing.__dict__,
-            "routeType": route_type
+            'billing': billing.__dict__
         }
+        if route_type is not None:
+            body['routeType'] = route_type
         if name is not None:
             body['name'] = name
         return self._send_request(http_methods.POST,