upate plugin MediaType
upate plugin MediaType

Signed-off-by: Victor Vieux <ce584ac70734cfa5a848cd28039798932c7ea675@docker.com>

jzwlqx/distribution,harrisonfeng/distribution,vdemeester/distribution,estesp/distribution,jwhonce/distribution,jzwlqx/distribution,sadlil/distribution,miminar/distribution,thaJeztah/distribution,RichardScothern/distribution,yuwaMSFT2/distribution,mbentley/distribution,mikebrow/distribution,docker/distribution,cezarsa/distribution,sergeyfd/distribution,shyr/distribution,jwhonce/distribution,thaJeztah/distribution,duglin/distribution,docker/distribution,manoj535/distribution,yuwaMSFT2/distribution,shyr/distribution,duglin/distribution,sadlil/distribution,dmcgowan/distribution,spacexnice/distribution,mbentley/distribution,konnase/distribution,konnase/distribution,dobril-stanga/distribution,cezarsa/distribution,sergeyfd/distribution,miminar/distribution,dobril-stanga/distribution,konstruktoid/distribution,nwt/distribution,mikebrow/distribution,harrisonfeng/distribution,vdemeester/distribution,spacexnice/distribution,manoj535/distribution,estesp/distribution,huamai-io/distribution,huamai-io/distribution,nwt/distribution,RichardScothern/distribution,konstruktoid/distribution,dmcgowan/distribution