"finder add" command doesn't show all entity fields

Seems like when developers autocomplete the finderName attribute of the finder add command, entities are beeing cached.

For that reason, if some developer autocomplete the command above with an specific entity and then applies some changes on it, finderName autocompletion doesn't show the new applied changes.

A possible solution could be:

• Clear cache every time --class parameter is autocompleted.
• Cache entity list when --class parameter is autocompleted.
• Use the new cache information everytime parameter --name is autocompleted.