Update `PlayOptions::delay` to `rclcpp::Duration` to get nanosecond resolution#843

Merged

emersonknapp merged 4 commits intomasterfrom emersonknapp/delay_test_types

Aug 13, 2021

+49-33

Commits on Aug 11, 2021

Convert all time comparisons in playing_respects_delay to use raw nanosecond counts so that error messages are readable (move to EXPECT as well)
Emerson Knapp
committed
Fix linter
Emerson Knapp
committed

Commits on Aug 12, 2021

Change type of PlayOptions::delay to rclcpp::Duration
Emerson Knapp
committed
Fix compiler warnings
Emerson Knapp
committed