Need to change the default wallpaper after login

[jiaowen520li]

Configuration:
PC: Dell-Vostro-260s
OS: 64bit

Upgrade UbuntuKylin from UK13.10-release to UK14.04.3(Run update-manager -d -c from a terminal in UK13.10-release). In the new system, the default wallpaper need to change after login.

使用命令“update-manager -d -c”对系统进行升级(UK13.10-release升级至UK14.04.3)，升级成功后的新系统，登录后的默认桌面壁纸仍是UK13.10的默认壁纸，需要更换为UK14.04的默认壁纸。

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1482584

[jiaowen520li (jiaowen520li)]

Configuration:
PC: HP-Pavilion-Sleekbook-15-PC
OS: 32bit & 64bit

Upgrade UbuntuKylin from UK13.10-release to UK14.04.3(Run update-manager -d -c from a terminal in UK13.10-release).
This bug isn't exist.