tests: dynappsrc: Add test case for upstream event
tests: dynappsrc: Add test case for upstream event

Change-Id: Id4a6dc5d94563de6af313777405a412bfb16f9b2
Reviewed-on: https://gpro.palm.com/46255
Reviewed-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>
Tested-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>

justinjoy/gst-plugins-lp,justinjoy/gst-plugins-lp