How do I fix the Spring XML validation in IntelliJ - intellij-idea

Question

I am getting a "false positive" error in a Spring XML file....
Expected behavior: The inbound channel adapter element with header-mapper of DefaultAmqpHeaderMapper validates properly in IntelliJ
Actual behavior: IntelliJ reports that the header-mapper is not of type HeaderMapper
There was an issue that was fixed in 3.0 but it seems like my IntelliJ is validating the below applicationContext.xml against an old version of the amqp schema. How do I refresh it?
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:int-amqp="http://www.springframework.org/schema/integration/amqp"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/integration/amqp http://www.springframework.org/schema/integration/amqp/spring-integration-amqp-4.2.xsd http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">
<int-amqp:inbound-channel-adapter
channel="ch1" queue-names="queue"
connection-factory="amqpConnectionFactory" error-channel="errorChannel"
header-mapper="allHeadersMapper" concurrent-consumers="1" />
Edit: Was found in 14.1.5. Upgraded to 2016.3.4 on Linux and reproduced.
Reproduced with simple code at https://github.com/dcw312/intellij-validation-error. IntelliJ issue created: https://youtrack.jetbrains.com/issue/IDEA-167842