Stash fails to startup if audit.highest.priority.to.log is set with an unsupported value

# Defines the lowest priority audit events that will be logged. This does not affect items stored in the audit log UI.
# Accepted values are: HIGH, MEDIUM, LOW and NONE. Setting the value to HIGH will result in only HIGH level events being logged
# NONE will cause no events to be logged. MEDIUM will only allow events with a priority of MEDIUM and HIGH to be logged.
audit.highest.priority.to.log=HIGH

2014-12-22 15:06:08,392 ERROR [spring-startup]  c.a.j.s.w.s.JohnsonDispatcherServlet SpringMVC dispatcher [springMvc] could not be started
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'auditEventListener': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void com.atlassian.stash.internal.audit.AuditEventListener.setPriorityToLog(com.atlassian.stash.audit.Priority); nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'com.atlassian.stash.audit.Priority'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.atlassian.stash.audit.Priority]: no matching editors or conversion strategy found
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[AutowiredAnnotationBeanPostProcessor.class:4.1.1.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) ~[AbstractApplicationContext.class:4.1.1.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[AbstractApplicationContext.class:4.1.1.RELEASE]
	at javax.servlet.GenericServlet.init(GenericServlet.java:158) [servlet-api.jar:3.1.FR]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_71]
	... 16 frames trimmed
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void com.atlassian.stash.internal.audit.AuditEventListener.setPriorityToLog(com.atlassian.stash.audit.Priority); nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'com.atlassian.stash.audit.Priority'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.atlassian.stash.audit.Priority]: no matching editors or conversion strategy found
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.class:4.1.1.RELEASE]
	... 5 common frames omitted
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'com.atlassian.stash.audit.Priority'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.atlassian.stash.audit.Priority]: no matching editors or conversion strategy found
	at org.springframework.beans.TypeConverterSupport.doConvert(TypeConverterSupport.java:74) ~[TypeConverterSupport.class:4.1.1.RELEASE]
	at org.springframework.beans.TypeConverterSupport.convertIfNecessary(TypeConverterSupport.java:47) ~[TypeConverterSupport.class:4.1.1.RELEASE]
	... 5 common frames omitted
Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.atlassian.stash.audit.Priority]: no matching editors or conversion strategy found
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:287) ~[TypeConverterDelegate.class:4.1.1.RELEASE]
	at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:107) ~[TypeConverterDelegate.class:4.1.1.RELEASE]
	at org.springframework.beans.TypeConverterSupport.doConvert(TypeConverterSupport.java:64) ~[TypeConverterSupport.class:4.1.1.RELEASE]
	... 6 common frames omitted