Does drinking alcohol having UTI may help to kill the bacteria?
To begin answering your question,


  Does drinking alcohol in reasonable amount by healthy individual (nonalcoholic) having UTI helps to kill bacteria in the urinary tract
  (in order to get rid of them quicker)?


We have to clarify that EtG detects ethyl glucuronide which is a byproduct of ethanol and remains in the urine for several day. The presence of ethyl alcohol in urine is significantly shorter somewhere between 8-12 hours (reference).

So what does this mean? Well, in order to "kill" the bacteria causing the UTI it must be exposed to a minimal inhibitory concentration of ethyl alcohol for a certain amount of time. Depending on the bacteria causing the infection this concentration and exposure time varies.

So if the concentration of ethyl alcohol was high enough and the flow of your urination and micturition long enough, maybe, but is unlikely to have much effect.