Auto batch fix default val +test (#10169)

* default config value for the AUTO_BATCH_TIMEOUT

* test for default config value for the AUTO_BATCH_TIMEOUT

* default val for timeout var

src/plugins/auto_batch/auto_batch.cpp

@@ -308,8 +308,8 @@ AutoBatchExecutableNetwork::AutoBatchExecutableNetwork(
     // WA for gcc 4.8 ( fails compilation with member init-list)
     _device = networkDevice;
     auto time_out = config.find(CONFIG_KEY(AUTO_BATCH_TIMEOUT));
-    if (time_out != config.end())
-        _timeOut = ParseTimeoutValue(time_out->second.as<std::string>());
+    IE_ASSERT(time_out != config.end());
+    _timeOut = ParseTimeoutValue(time_out->second.as<std::string>());
 }
 
 AutoBatchExecutableNetwork::~AutoBatchExecutableNetwork() {
@@ -639,6 +639,7 @@ IE_DEFINE_PLUGIN_CREATE_FUNCTION(AutoBatchInferencePlugin, version)
 
 AutoBatchInferencePlugin::AutoBatchInferencePlugin() {
     _pluginName = "BATCH";
+    _config[CONFIG_KEY(AUTO_BATCH_TIMEOUT)] = "1000";  // default value, in ms
 }
 
 InferenceEngine::Parameter AutoBatchInferencePlugin::GetMetric(

src/plugins/auto_batch/auto_batch.hpp

@@ -80,7 +80,7 @@ protected:
     std::unordered_map<std::string, InferenceEngine::Parameter> _config;
     bool _needPerfCounters = false;
     std::atomic_size_t _numRequestsCreated = {0};
-    std::atomic_int _timeOut = {1000};  // in ms
+    std::atomic_int _timeOut = {0};  // in ms
 };
 
 class AutoBatchInferRequest : public InferenceEngine::IInferRequestInternal {