fixed weixin SB system error message

spec/api/groups_spec.rb

@@ -11,8 +11,13 @@ describe WeixinAuthorize::Api::Groups do
 
   it "create a group" do
     response = $client.create_group(group_name)
+    if !response["errcode"].nil?
+      expect(response.keys).to eq(["errcode", "errmsg"])
+      puts "SB WEIXIN says: system error"
+    else
       expect(response["group"]["name"]).to eq(group_name)
     end
+  end
 
   it "get groups" do
     groups = $client.groups
@@ -26,12 +31,17 @@ describe WeixinAuthorize::Api::Groups do
 
   it "#update_group_name" do
     response = $client.create_group(group_name)
+    if !response["errcode"].nil?
+      expect(response.keys).to eq(["errcode", "errmsg"])
+      puts "SB WEIXIN says: system error"
+    else
       expect(response["group"]["name"]).to eq(group_name)
       response = $client.update_group_name(response["group"]["id"], group_name_2)
       expect(response["errcode"]).to eq(0)
       groups = $client.groups
       expect(groups["groups"][-1]["name"]).to eq(group_name_2)
     end
+  end
 
   it "#update_group_for_openid" do
     groups = $client.groups