Migrate activity log to JSON-based file from database (#2468)

This also includes:
- Record rename and transfer repository in activity log
- Check existence of repsoitory when rendering activity logs
- Drop Akka dependency

src/test/scala/gitbucket/core/service/MergeServiceSpec.scala

@@ -14,7 +14,7 @@ import scala.util.Using
 class MergeServiceSpec extends FunSpec {
   val service = new MergeService with AccountService with ActivityService with IssuesService with LabelsService
   with MilestonesService with RepositoryService with PrioritiesService with PullRequestService with CommitsService
-  with WebHookPullRequestService with WebHookPullRequestReviewCommentService {}
+  with WebHookPullRequestService with WebHookPullRequestReviewCommentService with RequestCache {}
   val branch = "master"
   val issueId = 10
   def initRepository(owner: String, name: String): File = {

src/test/scala/gitbucket/core/service/PullRequestServiceSpec.scala

@@ -18,7 +18,8 @@ class PullRequestServiceSpec
     with PrioritiesService
     with WebHookService
     with WebHookPullRequestService
-    with WebHookPullRequestReviewCommentService {
+    with WebHookPullRequestReviewCommentService
+    with RequestCache {
 
   def swap(r: (Issue, PullRequest)) = (r._2 -> r._1)
 

src/test/scala/gitbucket/core/service/ServiceSpecBase.scala

@@ -99,7 +99,7 @@ trait ServiceSpecBase extends MockitoSugar {
   lazy val dummyService = new RepositoryService with AccountService with ActivityService with IssuesService
   with MergeService with PullRequestService with CommitsService with CommitStatusService with LabelsService
   with MilestonesService with PrioritiesService with WebHookService with WebHookPullRequestService
-  with WebHookPullRequestReviewCommentService {
+  with WebHookPullRequestReviewCommentService with RequestCache {
     override def fetchAsPullRequest(
       userName: String,
       repositoryName: String,

src/test/scala/gitbucket/core/service/WebHookServiceSpec.scala

@@ -7,7 +7,7 @@ import gitbucket.core.model.WebHookContentType
 class WebHookServiceSpec extends FunSuite with ServiceSpecBase {
   lazy val service = new WebHookPullRequestService with AccountService with ActivityService with RepositoryService
   with MergeService with PullRequestService with IssuesService with CommitsService with LabelsService
-  with MilestonesService with PrioritiesService with WebHookPullRequestReviewCommentService
+  with MilestonesService with PrioritiesService with WebHookPullRequestReviewCommentService with RequestCache
 
   test("WebHookPullRequestService.getPullRequestsByRequestForWebhook") {
     withTestDB { implicit session =>

src/test/scala/gitbucket/core/view/AvatarImageProviderSpec.scala

@@ -169,8 +169,9 @@ class AvatarImageProviderSpec extends FunSpec with MockitoSugar {
       context: Context
     ): Html = getAvatarImageHtml(userName, size, mailAddress, tooltip)
 
-    override def getAccountByMailAddress(mailAddress: String)(implicit context: Context): Option[Account] = account
-    override def getAccountByUserName(userName: String)(implicit context: Context): Option[Account] = account
+    override def getAccountByMailAddressFromCache(mailAddress: String)(implicit context: Context): Option[Account] =
+      account
+    override def getAccountByUserNameFromCache(userName: String)(implicit context: Context): Option[Account] = account
   }
 
 }