container: Fix GHashTable leak

6 jobs for master in 27 minutes and 18 seconds (queued for 1 second)
Status Name Job ID Coverage
  Preparation
passed gst indent #69860

00:00:22

passed manifest #69859

00:00:23

 
  Build
passed build fedora x86_64 #69861

00:03:37

 
  Test
passed check fedora #69862

00:15:49

 
  Full Builds
passed build android arm64 api28 #69863

00:03:42

passed build cerbero fedora x86_64 #69864

00:07:27