Get rid of now-unneeded waits in integration tests

Now that we can force the NFS dir cache to invalidate at will, we should
no longer need to call WaitForLexboxMetadataUpdateAsync.

backend/Testing/Services/Utils.cs

@@ -61,6 +61,7 @@ ... on DbError {
                 }
             }
             """);
+        await apiTester.InvalidateDirCache(config.Code); // Ensure newly-created project is available right away
         return new LexboxProject(apiTester, config.Id);
     }
 
@@ -84,11 +85,6 @@ public static async Task WaitForHgRefreshIntervalAsync()
         await Task.Delay(TestingEnvironmentVariables.HgRefreshInterval);
     }
 
-    public static async Task WaitForLexboxMetadataUpdateAsync()
-    {
-        await Task.Delay(3000);
-    }
-
     private static string GetNewProjectDir(string projectCode,
         [CallerMemberName] string projectName = "")
     {

backend/Testing/SyncReverseProxy/SendReceiveServiceTests.cs

@@ -81,13 +81,11 @@ public async Task ModifyProjectData(HgProtocol protocol)
         var projectConfig = _srFixture.InitLocalFlexProjectWithRepo();
         await using var project = await RegisterProjectInLexBox(projectConfig, _adminApiTester);
 
-        await WaitForHgRefreshIntervalAsync();
-
         // Push the project to the server
         var sendReceiveParams = new SendReceiveParams(protocol, projectConfig);
         _sendReceiveService.SendReceiveProject(sendReceiveParams, AdminAuth);
 
-        await WaitForLexboxMetadataUpdateAsync();
+        await _adminApiTester.InvalidateDirCache(projectConfig.Code);
 
         // Verify pushed and store last commit
         var lastCommitDate = await _adminApiTester.GetProjectLastCommit(projectConfig.Code);
@@ -101,7 +99,7 @@ public async Task ModifyProjectData(HgProtocol protocol)
         // Push changes
         _sendReceiveService.SendReceiveProject(sendReceiveParams, AdminAuth, "Modify project data automated test");
 
-        await WaitForLexboxMetadataUpdateAsync();
+        await _adminApiTester.InvalidateDirCache(projectConfig.Code);
 
         // Verify the push updated the last commit date
         var lastCommitDateAfter = await _adminApiTester.GetProjectLastCommit(projectConfig.Code);
@@ -117,8 +115,6 @@ public async Task SendReceiveAfterProjectReset(HgProtocol protocol)
         var projectConfig = _srFixture.InitLocalFlexProjectWithRepo(protocol, "SR_AfterReset");
         await using var project = await RegisterProjectInLexBox(projectConfig, _adminApiTester);
 
-        await _adminApiTester.InvalidateDirCache(projectConfig.Code);
-
         var sendReceiveParams = new SendReceiveParams(protocol, projectConfig);
         var srResult = _sendReceiveService.SendReceiveProject(sendReceiveParams, AdminAuth);