Fix bug, allows using ament_copyright with bsd3 (#206)
Fix bug, allows using ament_copyright with bsd3 (#206)

* Fix bug, allows using ament_copyright with bsd3

In the bs2 headers, exists a "{copyright_holder}" text that causes a problem
when using the command ament_copyright to add headers to a source file.

This fix adds a default value for that key, to match the original 3-Clause BSD
text, and allowing to use the tool.

Signed-off-by: Jorge J. Perez <afab1c53f90df8000fd0bd323d84f98f2c232f36@ekumenlabs.com>

* Add copyright_name if template includes copyright_holder reference

Signed-off-by: Jorge J. Perez <afab1c53f90df8000fd0bd323d84f98f2c232f36@ekumenlabs.com>

* Revert comma addition

Signed-off-by: Jorge J. Perez <afab1c53f90df8000fd0bd323d84f98f2c232f36@ekumenlabs.com>

ament/ament_lint,ament/ament_lint,ament/ament_lint