Fixed SymbolicFragmentCompanyTest and company.mapping, fixed various warning

- SymbolicFragmentCompanyTest was failing because it used the old
relational schema (e.g. "employee.first_name").
- company.mapping.xml was causing some IssuesTest cases to fail because
it did not include "dept_locations" and the dependent birthdate
attribute was misnamed as "bdate" rather than "birth_date".