Update to OpenSaml 3.3.1

Fixes gh-7388

gradle/dependency-management.gradle

@@ -187,6 +187,9 @@ dependencyManagement {
 		dependency 'org.mockito:mockito-core:3.0.0'
 		dependency 'org.objenesis:objenesis:2.6'
 		dependency 'org.openid4java:openid4java-nodeps:0.9.6'
+		dependency 'org.opensaml:opensaml-core:3.3.1'
+		dependency 'org.opensaml:opensaml-saml-api:3.3.1'
+		dependency 'org.opensaml:opensaml-saml-impl:3.3.1'
 		dependency 'org.ow2.asm:asm:6.2.1'
 		dependency 'org.reactivestreams:reactive-streams:1.0.1'
 		dependency 'org.seleniumhq.selenium:htmlunit-driver:2.36.0'

saml2/saml2-service-provider/spring-security-saml2-service-provider.gradle

@@ -4,9 +4,9 @@ dependencies {
     compile project(':spring-security-core')
     compile project(':spring-security-web')
 
-    compile("org.opensaml:opensaml-core:3.3.0")
-    compile("org.opensaml:opensaml-saml-api:3.3.0")
-    compile("org.opensaml:opensaml-saml-impl:3.3.0")
+    compile("org.opensaml:opensaml-core")
+    compile("org.opensaml:opensaml-saml-api")
+    compile("org.opensaml:opensaml-saml-impl")
 
     provided 'javax.servlet:javax.servlet-api'
 }