Temporarily disable failing Tizen CI leg
Temporarily disable failing Tizen CI leg

Fixes https://github.com/dotnet/core-setup/issues/4408

Re-enabling tracked by https://github.com/dotnet/corefx/issues/28901

/cc @hqueue @alpencolt @gbalykov
wtgodbe/core-setup,weshaggard/core-setup,MichaelSimons/core-setup,rakeshsinghranchi/core-setup,weshaggard/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,weshaggard/core-setup,ericstj/core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,chcosta/core-setup,crummel/dotnet_core-setup,ericstj/core-setup,wtgodbe/core-setup,steveharter/core-setup,ericstj/core-setup,chcosta/core-setup,steveharter/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,chcosta/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,weshaggard/core-setup,steveharter/core-setup,crummel/dotnet_core-setup,steveharter/core-setup,steveharter/core-setup,weshaggard/core-setup,rakeshsinghranchi/core-setup,wtgodbe/core-setup,chcosta/core-setup,rakeshsinghranchi/core-setup,steveharter/core-setup,ericstj/core-setup,rakeshsinghranchi/core-setup,rakeshsinghranchi/core-setup,chcosta/core-setup,rakeshsinghranchi/core-setup,ericstj/core-setup,ericstj/core-setup,wtgodbe/core-setup,weshaggard/core-setup,chcosta/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup