Merge pull request #655 in YUNIONIO/onecloud from ~QUXUAN/onecloud:bugfix/qx-qcloud-eip to release/2.3.0

* commit '07eab509aafddd72a34fa60269b0d1ccb1ded51f':
  避免eip为空返回其他的eip

pkg/util/qcloud/region.go

@@ -91,6 +91,9 @@ func (self *SRegion) GetClient() *SQcloudClient {
 }
 
 func (self *SRegion) GetIEipById(eipId string) (cloudprovider.ICloudEIP, error) {
+	if len(eipId) == 0 {
+		return nil, cloudprovider.ErrNotFound
+	}
 	eips, total, err := self.GetEips(eipId, "", 0, 1)
 	if err != nil {
 		return nil, err