[test runner] copy all plan files to testplan folder
[test runner] copy all plan files to testplan folder

consider that maybe have several manifest files in conf/test
so copy all files list in conf/test/ to testplan/

Signed-off-by: zjh <2b052533cdbcec2c486b017cd9ef932a2d35e8d0@intel.com>

ostroproject/meta-iotqa,daweiwu/meta-iotqa-1,wanghongjuan/meta-iotqa-1,ostroproject/meta-iotqa,ostroproject/meta-iotqa,daweiwu/meta-iotqa-1,wanghongjuan/meta-iotqa-1,daweiwu/meta-iotqa-1,daweiwu/meta-iotqa-1,ostroproject/meta-iotqa,wanghongjuan/meta-iotqa-1,wanghongjuan/meta-iotqa-1,ostroproject/meta-iotqa,wanghongjuan/meta-iotqa-1,daweiwu/meta-iotqa-1