Update classgraph dependency to fix OpenJ9-specific issue

Author: oliverlockwood

pom.xml

@@ -71,7 +71,7 @@
 		<swagger-api.version>2.1.12</swagger-api.version>
 		<swagger-ui.version>4.1.3</swagger-ui.version>
 		<spring-security-oauth2.version>2.3.8.RELEASE</spring-security-oauth2.version>
-		<classgraph.version>4.8.117</classgraph.version>
+		<classgraph.version>4.8.138</classgraph.version>
 		<webjars-locator-core.version>0.45</webjars-locator-core.version>
 		<gmavenplus-plugin.version>1.8.1</gmavenplus-plugin.version>
 		<jaxb-impl.version>2.1</jaxb-impl.version>