Merge pull request #363 from grails/renovate/testingsupportversion

Update dependency org.grails:grails-gorm-testing-support to v2.2.0.RC2

Author: puneetbehl

gradle.properties

@@ -32,4 +32,4 @@ fieldsVersion=3.0.0.RC1
 grailsVersion=5.0.0.RC1
 micrometer.version=1.6.1
 scaffoldingVersion=4.0.0.RC1
-testingSupportVersion=2.2.0.RC1
+testingSupportVersion=2.2.0.RC2