The JsonSlurper returns the wrong value type for floating point numbers.

def result = new JsonSlurper().parseText('{"message":1.5}')
assert result.message.class == BigDecimal // failed with 2.3.0-beta-1 and was OK before
       |      |       |     |
       |      1.5     |     false
       [message:1.5]  class java.lang.Double