SEC-2537: Add nekohtml to openid module

openid/openid.gradle

@@ -18,5 +18,6 @@ dependencies {
 
     provided "javax.servlet:javax.servlet-api:$servletApiVersion"
 
-    runtime 'org.apache.httpcomponents:httpclient:4.2.3'
+    runtime 'org.apache.httpcomponents:httpclient:4.2.3',
+            'net.sourceforge.nekohtml:nekohtml:1.9.20'
 }

openid/pom.xml

@@ -128,6 +128,12 @@
       <version>3.0.1</version>
       <scope>provided</scope>
     </dependency>
+    <dependency>
+      <groupId>net.sourceforge.nekohtml</groupId>
+      <artifactId>nekohtml</artifactId>
+      <version>1.9.20</version>
+      <scope>runtime</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpclient</artifactId>