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

Dynappsrc should handle an EOS event that it send to all of linked
appsrce elements.

Change-Id: Ib17db1c8165ad995adec11d2e233753a7bdb845f
Reviewed-on: https://gpro.palm.com/47610
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