more coverity fixes

osal/host/FixedTimeslotTask.cpp

@@ -38,7 +38,6 @@ FixedTimeslotTask::~FixedTimeslotTask(void) {
     if(mainThread.joinable()) {
         mainThread.join();
     }
-    delete this;
 }
 
 void FixedTimeslotTask::taskEntryPoint(void* argument) {

osal/host/PeriodicTask.cpp

@@ -38,7 +38,6 @@ PeriodicTask::~PeriodicTask(void) {
 	if(mainThread.joinable()) {
 		mainThread.join();
 	}
-	delete this;
 }
 
 void PeriodicTask::taskEntryPoint(void* argument) {

osal/host/QueueMapManager.cpp

@@ -10,6 +10,10 @@ QueueMapManager::QueueMapManager() {
     mapLock = MutexFactory::instance()->createMutex();
 }
 
+QueueMapManager::~QueueMapManager() {
+    MutexFactory::instance()->deleteMutex(mapLock);
+}
+
 QueueMapManager* QueueMapManager::instance() {
 	if (mqManagerInstance == nullptr){
 		mqManagerInstance = new QueueMapManager();

osal/host/QueueMapManager.h

@@ -36,6 +36,8 @@ public:
 private:
 	//! External instantiation is forbidden.
 	QueueMapManager();
+	~QueueMapManager();
+
 	uint32_t queueCounter = 0;
 	MutexIF* mapLock;
 	QueueMap queueMap;