Add a "test" validator

src/main/resources/application.properties

@@ -8,4 +8,5 @@ spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS=false
 validator.common = common-beans.xml
 
 # Space-separated list of the validator configurations to load.
-validator.configurations = default-validator.xml second-validator.xml
+validator.configurations = default-validator.xml second-validator.xml \
+    test-validator.xml

src/main/resources/test-validator.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+    default-lazy-init="true"
+    xmlns:c="http://www.springframework.org/schema/c"
+    xmlns:p="http://www.springframework.org/schema/p"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="
+    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
+
+    <bean id="id" class="java.lang.String" c:_="test"/>
+    <bean id="description" class="java.lang.String" c:_="Test validator."/>
+
+</beans>