In version 5.2.2 [this](https://github.com/hibernate/hibernate-validator/commit/d341bfb7c1dd7b2493d14d4855a2a5353a528fde) change was made to PlatformResourceBundleLocator.

That broke number of validators which were working fine in 5.2.1

This change causes exception on Google Appengine. PlatformResourceBundleLocator is referencing ResourceBundle class, which is blacklisted in Google Appengine.

java.lang.NoClassDefFoundError: java.util.ResourceBundle$Control is a restricted class. Please see the Google App Engine developer's guide for more details.
at com.google.apphosting.runtime.security.shared.stub.java.util.ResourceBundle$Control.<clinit>(ResourceBundle.java)
at org.hibernate.validator.resourceloading.PlatformResourceBundleLocator$AggregateResourceBundle.<clinit>(PlatformResourceBundleLocator.java:169)
at org.hibernate.validator.resourceloading.PlatformResourceBundleLocator.loadBundle(PlatformResourceBundleLocator.java:132)
at org.hibernate.validator.resourceloading.PlatformResourceBundleLocator.getResourceBundle(PlatformResourceBundleLocator.java:105)
at org.hibernate.validator.messageinterpolation.AbstractMessageInterpolator.interpolateMessage(AbstractMessageInterpolator.java:264)
at org.hibernate.validator.messageinterpolation.AbstractMessageInterpolator.interpolate(AbstractMessageInterpolator.java:216)
at org.hibernate.validator.internal.engine.ValidationContext.interpolate(ValidationContext.java:422)
at org.hibernate.validator.internal.engine.ValidationContext.createConstraintViolation(ValidationContext.java:300)
at org.hibernate.validator.internal.engine.ValidationContext.createConstraintViolations(ValidationContext.java:261)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:456)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:127)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:592)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:555)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:490)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:454)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:406)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:204)