refactor out resteasy from adapters

testsuite/integration/src/test/java/org/keycloak/testsuite/DummySocialServlet.java

@@ -9,6 +9,7 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.net.URI;
 import java.nio.charset.Charset;
 import java.util.List;
 
@@ -34,7 +35,13 @@ public class DummySocialServlet extends HttpServlet {
         String state = null;
         String redirectUri = null;
 
-        List<NameValuePair> query = URLEncodedUtils.parse(req.getQueryString(), Charset.forName("UTF-8"));
+        List<NameValuePair> query = null;
+        try {
+            URI uri = URI.create(req.getRequestURL().append('?').append(req.getQueryString()).toString());
+            query = URLEncodedUtils.parse(uri, "UTF-8");
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
         for (NameValuePair p : query) {
             if ("state".equals(p.getName())) {
                 state = p.getValue();

testsuite/integration/src/test/java/org/keycloak/testsuite/OAuthClient.java

@@ -43,6 +43,7 @@ import org.openqa.selenium.By;
 import org.openqa.selenium.WebDriver;
 
 import javax.ws.rs.core.UriBuilder;
+import java.io.UnsupportedEncodingException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.charset.Charset;
@@ -127,7 +128,12 @@ public class OAuthClient {
             parameters.add(new BasicNameValuePair("password", password));
         }
 
-        UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters, Charset.forName("UTF-8"));
+        UrlEncodedFormEntity formEntity = null;
+        try {
+            formEntity = new UrlEncodedFormEntity(parameters, "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException(e);
+        }
         post.setEntity(formEntity);
 
         try {