(refs #74)Remove an auxiliary constructor from case class because json4s can't serialize correctly if case class have that.

src/main/scala/app/RepositorySettingsController.scala

@@ -142,7 +142,7 @@ trait RepositorySettingsControllerBase extends ControllerBase with FlashMapSuppo
         list.append(new CommitInfo(commit))
       }
 
-      val payload = new WebHookPayload(
+      val payload = WebHookPayload(
         git,
         "refs/heads/" + repository.repository.defaultBranch,
         repository,

src/main/scala/service/WebHookService.scala

@@ -74,10 +74,12 @@ object WebHookService {
   case class WebHookPayload(
     ref: String,
     commits: List[WebHookCommit],
-    repository: WebHookRepository){
+    repository: WebHookRepository)
 
-    def this(git: Git, refName: String, repositoryInfo: RepositoryInfo, commits: List[CommitInfo], repositoryOwner: Account) =
+  object WebHookPayload {
-      this(
+    def apply(git: Git, refName: String, repositoryInfo: RepositoryInfo,
+              commits: List[CommitInfo], repositoryOwner: Account): WebHookPayload =
+      WebHookPayload(
         refName,
         commits.map { commit =>
           val diffs = JGitUtil.getDiffs(git, commit.id, false)

src/main/scala/servlet/GitRepositoryServlet.scala

@@ -119,7 +119,8 @@ class CommitLogHook(owner: String, repository: String, userName: String, baseURL
         println(getRepository(owner, repository, baseURL).get.url)
 
         // call web hook
-        val payload = new WebHookPayload(git,
+        val payload = WebHookPayload(
+          git,
           command.getRefName,
           getRepository(owner, repository, baseURL).get,
           newCommits,