JsonSlurper is dropping precision of decimal numbers ending in 0 after the decimal point

When parsing JSON documents with numbers that end in a zero after the decimal point, JsonSlurper is not correctly setting the scale.

For example, when run in groovysh:

groovy:000> (1234.0).scale
===> 1
groovy:000> import groovy.json.JsonSlurper
===> groovy.json.JsonSlurper
groovy:000> new JsonSlurper().parseText('1234.0').scale
===> 0
groovy:000> (1234.10).scale
===> 2
groovy:000> new JsonSlurper().parseText('1234.10').scale
===> 1

This was found in Groovy versions 2.4.3 and 2.4.4.

For a result of this, please refer to https://github.com/DiUS/pact-jvm/issues/221