Add simple unit test for testing too-late drop_message

Change-Id: I13e88ea76dbbd35e255e22d2a715f5501ed372fd
24 jobs for drop_message in 36 minutes and 20 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Preparation
passed #637494
gst indent

00:01:14

passed #637493
manifest

00:00:50

 
  Build
passed #637504
build cerbero cross-android universal

00:12:14

manual #637508
gst-ios-12.2 allowed to fail manual
build cerbero cross-ios universal
passed #637505
build cerbero cross win32

00:10:26

passed #637506
build cerbero cross win64

00:08:24

passed #637503
build cerbero fedora x86_64

00:08:06

failed #637507
gst-macos-10.14
build cerbero macos x86_64

00:04:11

passed #637499
build clang fedora x86_64

00:07:29

passed #637495
build fedora x86_64

00:08:02

passed #637502
docker windows 1607
build msys2

00:11:50

passed #637496
build nodebug fedora x86_64

00:05:33

passed #637497
build static fedora x86_64

00:14:38

passed #637498
build static nodebug fedora x86_64

00:06:08

passed #637500
docker windows 1607
build vs2017 amd64

00:11:44

passed #637501
docker windows 1607
build vs2017 x86

00:11:55

 
  Test
passed #637509
check fedora

00:03:40

passed #637510
integration testsuites fedora

00:20:43

passed #637512
valgrind bad

00:06:19

passed #637513
valgrind ges

00:06:53

failed #637511
valgrind good

00:24:04

 
  Integrate
passed #637514
cross-android universal examples

00:08:10

skipped #637516
gst-ios-12.2 allowed to fail manual
cross-ios universal examples
passed #637515
documentation

00:06:33

 
Name Stage Failure
failed
valgrind good Test
           Total: 679
Uploading artifacts...
gst-build/build/meson-logs/: found 2 matching files
validate-logs: found 1456 matching files

Uploading artifacts to coordinator... ok
id=637511 responseStatus=201 Created token=63kshxZF
Uploading artifacts...
validate-logs/*.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=637511 responseStatus=201 Created token=63kshxZF
ERROR: Job failed: exit code 1
failed
build cerbero macos x86_64 Build
0:01:43 ***** Error running 'package' command:
0:01:43 Recipe 'gst-plugins-good-1.0' failed at the build step 'compile'
Fatal Error: Running ['sh', '-c', 'ninja -v -d keeprsp'], returncode 1

Uploading artifacts...
Runtime platform arch=amd64 os=darwin pid=10473 revision=ac2a293c version=11.11.2
manifest.xml: found 1 matching files

cerbero-build/logs: found 55 matching files

WARNING: gstreamer-1.0-1.*.pkg: no matching files
WARNING: gstreamer-1.0-devel-1.*.pkg: no matching files