Column.GetAlias should account for other suffixes

[fredericDelaporte]

NHibernate.Mapping.Column.GetAlias may generate aliases with a length up to Dialect.MaxAliasLength. But the query generation logic may append an additional suffix for distinguishing joins, causing the alias to grow bigger than maximum alias length. (This is done with NHibernate.SqlCommand.SelectFragment.)

Column.GetAlias should not exhaust the available length and keep at least three characters left for this additional suffix. (Allowing 99 joins + the _ of the suffix.)

[fredericDelaporte]

AbstractCollectionPersister does also abruptly:

 + "_owner_"; // Force the alias to be unique in case it conflicts with an alias in the entity

I will likely change it to "own" for avoiding getting above max length.

And it then can be further appended with select fragment suffix... I will reduces this to one character and save 4 in GetAlias.