Rewrite executor to template & come back executor unit tests

lib/concurrent/test/ExecutorIntegrationTest.cpp

@@ -1,8 +1,7 @@
 #include "gtest/gtest.h"
 #include "executor.h"
 #include "pimutex.h"
-
-const int WAIT_THREAD_TIME_MS = 30;
+#include "testutil.h"
 
 TEST(ExcutorIntegrationTest, execute_is_runnable_invoke) {
     PIMutex m;
@@ -14,11 +13,13 @@ TEST(ExcutorIntegrationTest, execute_is_runnable_invoke) {
         m.unlock();
     });
     piMSleep(WAIT_THREAD_TIME_MS);
+	m.lock();
     ASSERT_EQ(invokedRunnables, 1);
+    m.unlock();
 }
 
 TEST(ExcutorIntegrationTest, execute_is_not_execute_after_shutdown) {
-    bool isRunnableInvoke = false;
+    volatile bool isRunnableInvoke = false;
     PIThreadPoolExecutor executorService(1);
     executorService.shutdown();
     executorService.execute([&]() {
@@ -29,7 +30,7 @@ TEST(ExcutorIntegrationTest, execute_is_not_execute_after_shutdown) {
 }
 
 TEST(ExcutorIntegrationTest, execute_is_execute_before_shutdown) {
-    bool isRunnableInvoke = false;
+	volatile bool isRunnableInvoke = false;
     PIThreadPoolExecutor executorService(1);
     executorService.execute([&]() {
         piMSleep(WAIT_THREAD_TIME_MS);