How to include poco in package.xml

[ahcorde]

I have been checking how we include poco in the package.xml across the official ros2 packages.

In same of them:

• poco_vendor and rmw_implementation

 <depend>libpoco-dev</depend>
 <depend>poco_vendor</depend>

• class_loader, rosidl_typesupport_c and rosidl_typesupport_cpp

  <build_depend>libpoco-dev</build_depend>
  <exec_depend>libpoco-dev</exec_depend>

I think libpoco-dev shouldn't be a <exec_depend> or <depend> because it's just something that we use for building.

the right approach should be something like:

  <build_depend>libpoco-dev</build_depend>
  <exec_depend>poco_vendor</exec_depend>

@wjwwood and @dirk-thomas which are your thoughts?

[ahcorde]

Closing this issue because poco will be removed from ros2 dependencies ros2/rcutils#216