Add spring-security-4.2.xsd to spring.schemas

Fixes gh-4098

config/src/main/resources/META-INF/spring.schemas

@@ -1,4 +1,5 @@
-http\://www.springframework.org/schema/security/spring-security.xsd=org/springframework/security/config/spring-security-4.1.xsd
+http\://www.springframework.org/schema/security/spring-security.xsd=org/springframework/security/config/spring-security-4.2.xsd
+http\://www.springframework.org/schema/security/spring-security-4.2.xsd=org/springframework/security/config/spring-security-4.2.xsd
 http\://www.springframework.org/schema/security/spring-security-4.1.xsd=org/springframework/security/config/spring-security-4.1.xsd
 http\://www.springframework.org/schema/security/spring-security-4.0.xsd=org/springframework/security/config/spring-security-4.0.xsd
 http\://www.springframework.org/schema/security/spring-security-3.2.xsd=org/springframework/security/config/spring-security-3.2.xsd