Fix bugs (#600)

Author: gailwang

tencentcloud/resource_tc_kubernetes_cluster.go

@@ -1078,7 +1078,10 @@ func tkeGetCvmRunInstancesPara(dMap map[string]interface{}, meta interface{},
 	request.InstanceCount = &count
 
 	if v, ok := dMap["hostname"]; ok {
-		request.HostName = helper.String(v.(string))
+		hostname := v.(string)
+		if hostname != "" {
+			request.HostName = &hostname
+		}
 	}
 
 	cvmJson = request.ToJsonString()

tencentcloud/service_tencentcloud_postgresql.go

@@ -227,7 +227,7 @@ func (me *PostgresqlService) DescribePostgresqlInstanceById(ctx context.Context,
 			errRet = err
 			return
 		}
-		if ee.Code == "InvalidParameter" {
+		if ee.Code == "InvalidParameter" || ee.Code == "ResourceNotFound.InstanceNotFoundError" {
 			errRet = nil
 		} else {
 			errRet = err