Revert Generics Addition to support Spring Boot 1.5 a little longer.

Signed-off-by: Ben Hale <bhale@pivotal.io>

Author: nebhale

java-buildpack-client-certificate-mapper-javax/src/main/java/org/cloudfoundry/router/javax/ClientCertificateMapperAutoConfiguration.java

@@ -38,8 +38,8 @@ ClientCertificateMapper clientCertificateMapper() throws CertificateException {
     }
 
     @Bean
-    FilterRegistrationBean<ClientCertificateMapper> clientCertificateMapperFilterRegistrationBean(ClientCertificateMapper mapper) {
-        FilterRegistrationBean<ClientCertificateMapper> result = new FilterRegistrationBean<>(mapper);
+    FilterRegistrationBean clientCertificateMapperFilterRegistrationBean(ClientCertificateMapper mapper) {
+        FilterRegistrationBean result = new FilterRegistrationBean(mapper);
         result.setOrder(Ordered.HIGHEST_PRECEDENCE);
         return result;
     }