Change default lift current mode to AGV

[cnboonhan]

Signed-off-by: Charayaphan Nakorn Boon Han charayaphan.nakorn.boon.han@gmail.com

Bug fix

Fixed bug

https://github.com/open-rmf/rmf_simulation/blob/main/rmf_building_sim_common/src/lift_common.cpp#L271
https://github.com/open-rmf/rmf_simulation/blob/main/rmf_building_sim_common/src/lift_common.cpp#L254-L258
Currently, the plugin defaults to publishing MODE_UNKNOWN as the initial current_mode. This causes issues downstream in rmf-web open-rmf/rmf-web#510

Fix applied

Enforce initial state of lift to be AGV mode for gazebo simulations

[codecov]

Codecov Report

Merging #52 (5639190) into main (b70c6a0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            main     #52     +/-   ##
=======================================
  Coverage   0.00%   0.00%             
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  Files        204     138     -66     
  Lines      19196   12845   -6351     
=======================================
+ Misses     19196   12845   -6351     

Flag	Coverage Δ
tests	0.00% <ø> (ø)

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Impacted Files	Coverage Δ
..._building_sim_gazebo_plugins/src/toggle_floors.cpp
...lation/rmf_building_sim_common/src/door_common.cpp
.../rmf_simulation/rmf_robot_sim_common/src/utils.cpp
...ion/rmf_robot_sim_ignition_plugins/src/slotcar.cpp
...ion/rmf_robot_sim_ignition_plugins/src/slotcar.cpp
...rmf_building_sim_common/crowd_simulator_common.hpp
...tion/rmf_robot_sim_gazebo_plugins/src/readonly.cpp
..._building_sim_gazebo_plugins/src/toggle_floors.cpp
...rmf_building_sim_common/crowd_simulator_common.hpp
...building_sim_common/src/crowd_simulator_common.cpp
... and 320 more

[cnboonhan]

lift_with_rmf_web-2021-09-15_20.07.49.mp4