title: Jackson remove "e" from BigDecimal
body: <p>I have a low decimal value:  2e-8 
  I want it to be presented as JSON in the format 0.00000002</p>
  
  <p>Tried to create a JsonSerializer and use BigDecimal method "toPlainString" but it is not good for me because the JSON has to show a number and not a string value.</p>
  
  <p>What can I do?</p>
  
  <p>Regards, Ido</p>