BUG: Multiple aliases on the same column not behaving as expected

[zbrookle]

column = table.some_column
table.projection(
        [
            column.name("alias1"),
            column.name("alias2"),
            column.name("alias3"),
        ]
    )

I think the expected behavior would be a table expression with:

Selection[table]
  table:
    Table: ref_0
  selections:
    alias1 = Column[float64*] 'some_column' from table
      ref_0
    alias2 = Column[float64*] 'some_column' from table
      ref_0
    alias3 = Column[float64*] 'some_column' from table
      ref_0

However, the result I'm getting is:

Selection[table]
  table:
    Table: ref_0
  selections:
    alias1 = Column[float64*] 'some_column' from table
      ref_0
    alias1 = Column[float64*] 'some_column' from table
      ref_0
    alias1 = Column[float64*] 'some_column' from table
      ref_0

[jreback]

reverting the PR

[gforsyth]

Closed via #2284