kola: bump fleet request timeout to 2.5s
kola: bump fleet request timeout to 2.5s

glevand/coreos--mantle,quantum/coreos-mantle,glevand/coreos--mantle,marineam/mantle,mjg59/mantle,marineam/mantle,mjg59/mantle,mischief/mantle,dm0-/mantle,mischief/mantle,quantum/coreos-mantle,dm0-/mantle