Reserved words in table and column names

 > Identifier quoting is a workaround for using reserved words that often causes problems in edge cases. Do not use identifier quoting and avoid using reserved words as table or column names.

this leads to weird sideeffects with ``bin/doctrine-module  orm:schema-tool:update``

remove identifier quoting from:
- [x] user table
- [x] role table

rename
- [x] group table