Align asserting party property with Spring Boot

Closes gh-74

servlet/spring-boot/java/saml2/refreshable-metadata/src/main/java/example/RefreshableRelyingPartyRegistrationRepository.java

@@ -68,7 +68,7 @@ public class RefreshableRelyingPartyRegistrationRepository
 
 	private void fetchMetadata(String registrationId, Saml2RelyingPartyProperties.Registration registration) {
 		RelyingPartyRegistration relyingPartyRegistration = RelyingPartyRegistrations
-				.fromMetadataLocation(registration.getAssertingParty().getMetadataUri())
+				.fromMetadataLocation(registration.getAssertingparty().getMetadataUri())
 				.signingX509Credentials((credentials) -> registration.getSigning().getCredentials().stream()
 						.map(this::asSigningCredential).forEach(credentials::add))
 				.registrationId(registrationId).build();

servlet/spring-boot/java/saml2/refreshable-metadata/src/main/resources/application.yml

@@ -7,7 +7,7 @@ spring:
             signing.credentials:
               - private-key-location: classpath:credentials/rp-private.key
                 certificate-location: classpath:credentials/rp-certificate.crt
-            asserting-party:
+            assertingparty:
               metadata-uri: https://dev-05937739.okta.com/app/exk46xofd8NZvFCpS5d7/sso/saml/metadata
 
 logging.level: