fixed 484ed121 from https://gitee.com/xia-liang-jiang/applications_sample_wifi_iot/pulls/250

Signed-off-by: Nredjie <hongshaojie@h-partners.com>
Change-Id: Iab0ee27c7bab1b2224e148d372c184e662772a27

screenshot32/resource/capturescreentest.py

@@ -358,7 +358,6 @@ if __name__ == "__main__":
             else:
                 picture_save(picture_path)
                 PrintToLog("SmokeTest:: error:testcase 0, distributed failed!")
-                SysExit()
         EnterShellCmd("ifconfig eth0 down", 1)
 
     try: