tests: dynappsrc: Update test case for EOS event
tests: dynappsrc: Update test case for EOS event

After sending an EOS event all of appsrc elements, GST_MESSAGE_EOS
should be triggered by bus.

Change-Id: Ied1e70f6a6ac6612eeb2522952f7b5023e583865
Reviewed-on: https://gpro.palm.com/47641
Tested-by: HoonHee Lee <41497318ef67053f37c2ac0e974a3369f66d66ec@lge.com>
Reviewed-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>
Tested-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>

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