Added parallel recovery behaviors

Use PythonExpression to evaluate the condition substitution

This reverts commit 876b833e.

add lambda callbacks directly

Once the child node begins to run, it should continue to run until completion.

Also optimizing the git clone step by referencing the checked out
copy of the repo.

Apparently every job starts with a clean container.

* update dwb plugin pkg readme

* Update nav2_dwb_controller/README.md

Co-Authored-By: Matt Hansen <matthew.k.hansen@intel.com>

* Update nav2_dwb_controller/README.md

Co-Authored-By: Matt Hansen <matthew.k.hansen@intel.com>

* Update nav2_dwb_controller/README.md

Co-Authored-By: Matt Hansen <matthew.k.hansen@intel.com>

* Update README.md

Nav2 wp follower

* fixing lazy implementation of action clinet

* remove rate object unused and debug artifact

* changing behavior tree to use snake_case actions

* correct action servers not related to recovery

* resolve recovery server plugin names with action server names

* changing references from local planner to controller outside of DWB

* change minimum in DWB planner to be controllers

* Update nav2_core/include/nav2_core/controller.hpp

Co-Authored-By: bpwilcox <bpwilcox@eng.ucsd.edu>

Update index.rst

changing TB3 burger to waffle

move collision checker as an input to the configure method of recoveries

adding warning when robot is out of costmap bounds

* Adding the PipelineSequence node

* Rewrite tree to take advantage of the new node.

* Add image generator

* Adding documentation

* Clarifying documentation on PipelineSequence

Reorg bt nav

I was following this guide.
To install ros2-navigation, need to edit `ros2-dashing-navigation2` to `ros-dashing-navigation2`.

When I tried original command from this guide, I got error below.

```bash
$ sudo apt install ros2-dashing-navigation2
Reading package lists... Done
Building dependency tree... 50%
Building dependency tree       
Reading state information... Done
E: Unable to locate package ros2-dashing-navigation2
$ sudo apt install ros2-dashing-nav2-bringup
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ros2-dashing-nav2-bringup
```

adding navigation2 new diagram

planner/controller properties to IDs

Minor fix for broken link in build.md file