Load '_runnerSettings' in the early point of JobRunner.cs (actions#3218)

Author: TingluoHuang

src/Runner.Worker/JobRunner.cs

@@ -42,6 +42,7 @@ public async Task<TaskResult> RunAsync(AgentJobRequestMessage message, Cancellat
             Trace.Info("Job ID {0}", message.JobId);
 
             DateTime jobStartTimeUtc = DateTime.UtcNow;
+            _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
             IRunnerService server = null;
 
             // add orchestration id to useragent for better correlation.
@@ -164,8 +165,6 @@ public async Task<TaskResult> RunAsync(AgentJobRequestMessage message, Cancellat
 
                 jobContext.SetRunnerContext("os", VarUtil.OS);
                 jobContext.SetRunnerContext("arch", VarUtil.OSArchitecture);
-
-                _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
                 jobContext.SetRunnerContext("name", _runnerSettings.AgentName);
 
                 if (jobContext.Global.Variables.TryGetValue(WellKnownDistributedTaskVariables.RunnerEnvironment, out var runnerEnvironment))