do not allow HTTP timeouts to happen in excessive.py
do not allow HTTP timeouts to happen in excessive.py

We set the http keepalive timeout to zero to prevent a timeout from
happneing while we're waiting for a process to finish and then
we end up trying to request from a connection that no longer exists.
Instead we timout the connections right away so that each time a new
fresh connection is aquired.

This is something that has been coming up lately in very lately in long
running tests.

marlengit/BitcoinUnlimited,krzysztofwos/BitcoinUnlimited,arruah/ensocoin,AllanDoensen/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-bu,Bitcoin-com/BUcash,Bitcoin-com/BUcash,AllanDoensen/BitcoinUnlimited,marcusdiaz/BitcoinUnlimited,Bitcoin-com/BUcash,BitcoinUnlimited/BitcoinUnlimited,arruah/ensocoin,Justaphf/BitcoinUnlimited,BitcoinUnlimited/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-bu,marcusdiaz/BitcoinUnlimited,krzysztofwos/BitcoinUnlimited,cddjr/BitcoinUnlimited,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,Justaphf/BitcoinUnlimited,cddjr/BitcoinUnlimited,Justaphf/BitcoinUnlimited,marlengit/BitcoinUnlimited,arruah/ensocoin,AllanDoensen/BitcoinUnlimited,krzysztofwos/BitcoinUnlimited,AllanDoensen/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-bu,krzysztofwos/BitcoinUnlimited,BitcoinUnlimited/BitcoinUnlimited,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,krzysztofwos/BitcoinUnlimited,Justaphf/BitcoinUnlimited,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,cddjr/BitcoinUnlimited,marlengit/BitcoinUnlimited,cddjr/BitcoinUnlimited,Bitcoin-com/BUcash,marcusdiaz/BitcoinUnlimited,Bitcoin-com/BUcash,BitcoinUnlimited/BitcoinUnlimited,arruah/ensocoin,arruah/ensocoin,BTCfork/hardfork_prototype_1_mvf-bu,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,BTCfork/hardfork_prototype_1_mvf-bu,AllanDoensen/BitcoinUnlimited,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,BitcoinUnlimited/BitcoinUnlimited,AllanDoensen/BitcoinUnlimited,marlengit/BitcoinUnlimited,cddjr/BitcoinUnlimited,Justaphf/BitcoinUnlimited,Justaphf/BitcoinUnlimited,marcusdiaz/BitcoinUnlimited,Bitcoin-com/BUcash,krzysztofwos/BitcoinUnlimited,marlengit/BitcoinUnlimited,marlengit/BitcoinUnlimited,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,marcusdiaz/BitcoinUnlimited,cddjr/BitcoinUnlimited,arruah/ensocoin,BTCfork/hardfork_prototype_1_mvf-bu,marcusdiaz/BitcoinUnlimited,BitcoinUnlimited/BitcoinUnlimited