Reduce time of timer_test; use unique_lock instead of guard

lib/include/srslte/common/timers.h

@@ -100,7 +100,7 @@ class timer_handler
 
     void run()
     {
-      std::lock_guard<std::mutex> lock(parent->mutex);
+      std::unique_lock<std::mutex> lock(parent->mutex);
       if (not active) {
         ERROR("Error: calling run() for inactive timer id=%d\n", id());
         return;

lib/test/common/timer_test.cc

@@ -199,7 +199,7 @@ int timers2_test3()
 static std::vector<timer_handler::unique_timer> timers2_test4_t;
 static srslte::tti_sync_cv                      timers2_test4_tti_sync1;
 static srslte::tti_sync_cv                      timers2_test4_tti_sync2;
-static uint32_t                                 duration = 10000;
+static uint32_t                                 duration = 1000;
 
 static void timers2_test4_thread()
 {