F parse acl

Summary

Fixes the parsing of EntityACLs #106

Focus

The parsing uses the grant and deny methods of the ACL class. For convenience reasons, these would remove any present contradicting rules. This makes a lot of sense when an ACL is being constructed from scratch, but for parsing the server's response it is necessary to keep contradicting rules.

Test Environment

No manual testing required. Just check the new unit test.

Check List for the Author

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