Update dependency org.jboss.resteasy:resteasy-jaxrs to v3.15.3.Final

pom.xml

@@ -18,7 +18,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <keycloak.version>7.0.0</keycloak.version>
     <jboss-transaction-api_1.2_spec>1.1.1.Final</jboss-transaction-api_1.2_spec>
-    <resteasy.version>3.6.1.Final</resteasy.version>
+    <resteasy.version>3.15.3.Final</resteasy.version>
     <bouncycastle.version>1.60</bouncycastle.version>
     <jboss.logging.version>3.3.2.Final</jboss.logging.version>
     <apache.httpcomponents.version>4.5.2</apache.httpcomponents.version>