fix: addGroup、updateGroup exception

Author: otary

gitlab4j-api/src/main/java/org/gitlab4j/api/GroupApi.java

@@ -636,7 +636,7 @@ public Optional<Group> getOptionalGroup(Object groupIdOrPath) {
      * @throws GitLabApiException if any exception occurs
      */
     public Group createGroup(GroupParams params) throws GitLabApiException {
-        Response response = post(Response.Status.CREATED, params.getForm(true), "groups");
+        Response response = post(Response.Status.CREATED, new GitLabApiForm(params.getForm(true)), "groups");
         return (response.readEntity(Group.class));
     }
 
@@ -651,8 +651,11 @@ public Group createGroup(GroupParams params) throws GitLabApiException {
      * @throws GitLabApiException at any exception
      */
     public Group updateGroup(Object groupIdOrPath, GroupParams params) throws GitLabApiException {
-        Response response =
-                putWithFormData(Response.Status.OK, params.getForm(false), "groups", getGroupIdOrPath(groupIdOrPath));
+        Response response = putWithFormData(
+                Response.Status.OK,
+                new GitLabApiForm(params.getForm(false)),
+                "groups",
+                getGroupIdOrPath(groupIdOrPath));
         return (response.readEntity(Group.class));
     }
 
@@ -2455,7 +2458,11 @@ public void revokeGroupAccessToken(Object groupIdOrPath, Long tokenId) throws Gi
      */
     public GroupHook addWebhook(Object groupIdOrPath, GroupHookParams groupHookParams) throws GitLabApiException {
         Response response = post(
-                Response.Status.CREATED, groupHookParams.getForm(), "groups", getGroupIdOrPath(groupIdOrPath), "hooks");
+                Response.Status.CREATED,
+                new GitLabApiForm(groupHookParams.getForm()),
+                "groups",
+                getGroupIdOrPath(groupIdOrPath),
+                "hooks");
         return (response.readEntity(GroupHook.class));
     }