AKN4EUUtils - Don't return error for certain LW-specific commands

SUMMARY

The content.xml used for the LEG prefinalisation service (part of Akn4EuUtils) has large similarities to the corresponding content.xml file used for LegisWrite prefinalisation service. However, it only supports a subset of the commands that are available for LegisWrite documents.

When one of the commands is used that is not supported for LEG prefinalisation, the service currently gives an error result and does not process the LEG file sent along.

ACCEPTANCE CRITERIAS / GOALS

The behaviour should be adapted such that the unsupported commands contained in the list below don't lead to an error result or to a crash of the LEG prefinalisation. Instead, they should simply be ignored; their reply could e.g. be filled with "Command not available" (code number TODO).

Note: Using other commands, i.e. not being part of the list below, should still lead to an error result.

OTHER DESCRIPTIONS / DOCUMENTATION

• Documentation of the list of commands existing for LEG and LegisWrite documents: https://citnet.tech.ec.europa.eu/CITnet/confluence/spaces/LEOS/pages/1412886502/LW+API+LegisWrite+API+and+Edit+API+VS

  This list should serve as the basis for implementation.