EGD-2955 EGD-3588 Timers fully refactored & updated (#721)

* Timers now are Application thread safe
* Timers now have consistent API independend of Application (no more c style timers)
* Timers can have either: callback or override onTimer() method - this
  way we can create more complicated timers or just use existing ones
* gui::Timer added via adapter class GuiTimer to decouple sys::Timer
  with gui::Timer
* Fixed race in wrapper
* Updated docs
* fixed using std and cpp_freertos and DataReceivedHandler hidden in Application.hpp

module-sys/SystemManager/SystemManager.cpp

@@ -303,25 +303,6 @@ namespace sys
         return ReturnCodes::Success;
     }
 
-    void SystemManager::TickHandler(uint32_t id)
-    {
-        if (id == pingPongTimerID) {
-
-            for (auto &w : servicesList) {
-                if (w->pingTimestamp == 0) {
-                    // no reponse for ping messages, restart system
-                    LOG_FATAL("%s", (w->GetName() + " failed to response to ping message").c_str());
-                    exit(1);
-                }
-                else {
-                    w->pingTimestamp = 0;
-                }
-            }
-
-            Bus::SendBroadcast(std::make_shared<SystemMessage>(SystemMessageType::Ping), this);
-        }
-    }
-
     Message_t SystemManager::DataReceivedHandler(DataMessage * /*msg*/, ResponseMessage * /*resp*/)
     {
         return std::make_shared<ResponseMessage>();
@@ -331,8 +312,6 @@ namespace sys
     {
         LOG_DEBUG("Invoking closing procedure...");
 
-        DeleteTimer(pingPongTimerID);
-
         // We are going to remove services in reversed order of creation
         CriticalSection::Enter();
         std::reverse(servicesList.begin(), servicesList.end());