Increasing test count from timeout handling changes (#4234)

Signed-off-by: Steve Macenski <stevenmacenski@gmail.com>

nav2_behavior_tree/test/plugins/action/test_bt_action_node.cpp

@@ -316,8 +316,10 @@ TEST_F(BTActionNodeTestFixture, test_server_timeout_success)
   // the BT should have failed
   EXPECT_EQ(result, BT::NodeStatus::FAILURE);
 
-  // since the server timeout is 20ms and bt loop duration is 10ms, number of ticks should be 2
-  EXPECT_EQ(ticks, 2);
+  // since the server timeout is 20ms and bt loop duration is 10ms, number of ticks should
+  // be at most 2, but it can be 1 too, because the tickOnce may execute two ticks.
+  EXPECT_LE(ticks, 3);
+  EXPECT_GE(ticks, 1);
 }
 
 TEST_F(BTActionNodeTestFixture, test_server_timeout_failure)
@@ -362,7 +364,7 @@ TEST_F(BTActionNodeTestFixture, test_server_timeout_failure)
   EXPECT_EQ(result, BT::NodeStatus::FAILURE);
 
   // since the server timeout is 90ms and bt loop duration is 10ms, number of ticks should be 9
-  EXPECT_EQ(ticks, 9);
+  EXPECT_EQ(ticks, 10);
 
   // start a new execution cycle with the previous BT to ensure previous state doesn't leak into
   // the new cycle