MonitoredItem: test fix

Author: viacheslauK

shared/libraries/opcuageneric/opcuageneric_client/tests/test_opcua_monitored_item_fb.cpp

@@ -384,6 +384,7 @@ TEST_F(GenericOpcuaMonitoredItemTest, ReadValueWithServerTimestampUsingLastValue
     ASSERT_TRUE(prevVal.assigned());
 
     const auto timeBefore = getTime();
+    std::this_thread::sleep_for(std::chrono::milliseconds(2));
 
     ASSERT_NO_THROW(testHelper.writeValueNode(nodeId, variant));
 
@@ -396,6 +397,7 @@ TEST_F(GenericOpcuaMonitoredItemTest, ReadValueWithServerTimestampUsingLastValue
 
     auto domainVal = domainSig.getLastValue();
     const auto timeAfter = getTime();
+    std::this_thread::sleep_for(std::chrono::milliseconds(2));
 
     // check that the target and read values are the same
     ASSERT_EQ(val.asPtr<INumber>().getValue<int64_t>(int64_t(0)), value);
@@ -517,6 +519,7 @@ TEST_F(GenericOpcuaMonitoredItemTest, ReadValueWithServerTimestampUsingTailReade
     ASSERT_TRUE(prevVal.assigned());
 
     const auto timeBefore = getTime();
+    std::this_thread::sleep_for(std::chrono::milliseconds(2));
 
     auto reader = TailReaderBuilder()
                       .setSignal(fb.getSignals()[0])
@@ -651,6 +654,7 @@ TEST_F(GenericOpcuaMonitoredItemTest, ReadValueWithLocalSystemTimestampUsingTail
     ASSERT_TRUE(prevVal.assigned());
 
     const auto timeBefore = getTime();
+    std::this_thread::sleep_for(std::chrono::milliseconds(2));
 
     auto reader = TailReaderBuilder()
                       .setSignal(fb.getSignals()[0])