(Towards #201) Symbol table does not respect use association

[arporter]

fparser2 fails for the following code:

module my_mod

contains

  subroutine log_minmax( self, log_level, label )

    use log_mod,    only : log_event, log_scratch_space,     &
                       application_log_level => log_level
    integer, intent(in) :: log_level
  end subroutine log_minmax

end module

with:

fparser.two.symbol_table.SymbolTableError: Symbol table already contains a use of a symbol named 'log_level' from module 'log_mod'

whereas 'log_mod' is actually renamed as 'application_log_level' in the use statement.

[arporter]

This is actually a known limitation and part of #201. However, that's quite a big issue so I shall keep this one open for this specific fix.