Update the example product to have errands with impact_warning
Update the example product to have errands with impact_warning

[#163211506] Tile Author can specify impact warning for errand (and see in API)

Signed-off-by: Ming Xiao <fde61075b779168f6585a9760a4f9e9e08423562@pivotal.io>

pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example