Add the mediagroup attribute. b=831
Add the mediagroup attribute. b=831

tripu/validator,YOTOV-LIMITED/validator,sammuelyee/validator,sammuelyee/validator,sammuelyee/validator,validator/validator,takenspc/validator,validator/validator,validator/validator,tripu/validator,takenspc/validator,takenspc/validator,tripu/validator,takenspc/validator,validator/validator,sammuelyee/validator,tripu/validator,YOTOV-LIMITED/validator,YOTOV-LIMITED/validator,YOTOV-LIMITED/validator,sammuelyee/validator,tripu/validator,takenspc/validator,YOTOV-LIMITED/validator,validator/validator