VP9 dynamic resize: enable resize unit test(DownUp).
VP9 dynamic resize: enable resize unit test(DownUp).

The unit test requires a longer clip which is already in the repo.

Change-Id: Ic42e8d83e636fafd20d485a7f5f8422835319245

mbebenita/aom,shacklettbp/aom,GrokImageCompression/aom,ShiftMediaProject/libvpx,GrokImageCompression/aom,thdav/aom,webmproject/libvpx,smarter/aom,luctrudeau/aom,mwgoldsmith/vpx,mbebenita/aom,smarter/aom,webmproject/libvpx,webmproject/libvpx,mwgoldsmith/vpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,mwgoldsmith/libvpx,thdav/aom,GrokImageCompression/aom,jmvalin/aom,Topopiccione/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,GrokImageCompression/aom,luctrudeau/aom,smarter/aom,ShiftMediaProject/libvpx,Topopiccione/libvpx,ShiftMediaProject/libvpx,mbebenita/aom,openpeer/libvpx_new,mbebenita/aom,mbebenita/aom,luctrudeau/aom,mwgoldsmith/vpx,jmvalin/aom,ShiftMediaProject/libvpx,mwgoldsmith/vpx,jmvalin/aom,webmproject/libvpx,smarter/aom,ittiamvpx/libvpx-1,jmvalin/aom,mbebenita/aom,GrokImageCompression/aom,shacklettbp/aom,mbebenita/aom,openpeer/libvpx_new,mwgoldsmith/libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,openpeer/libvpx_new,openpeer/libvpx_new,shacklettbp/aom,smarter/aom,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,mwgoldsmith/vpx,ittiamvpx/libvpx-1,Topopiccione/libvpx,mwgoldsmith/libvpx,thdav/aom,mbebenita/aom,Topopiccione/libvpx,smarter/aom,luctrudeau/aom,jmvalin/aom,Topopiccione/libvpx,thdav/aom,webmproject/libvpx,luctrudeau/aom,openpeer/libvpx_new,shacklettbp/aom,luctrudeau/aom,jmvalin/aom,thdav/aom,thdav/aom,shacklettbp/aom,shacklettbp/aom,GrokImageCompression/aom,webmproject/libvpx,openpeer/libvpx_new,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,mbebenita/aom