msdk: change the wait time for encoder and vpp

In MSDK samples, the wait time for encoder, decoder and vpp is
300000. Let's set the wait time to the same value in msdk plugin
7 jobs for misc-fixes in 75 minutes and 50 seconds (queued for 1 minute and 3 seconds)
Status Name Job ID Coverage
  Preparation
passed gst indent #61881

00:00:35

passed manifest #61880

00:00:22

 
  Build
passed build fedora x86_64 #61882

00:03:39

 
  Test
passed check fedora #61910

00:15:50

failed check fedora #61883

00:16:13

 
  Full Builds
passed build android arm64 api28 #61884

00:03:51

passed build cerbero fedora x86_64 #61885

00:55:21