Makes injecting the target tablespace much easier and fixes interaction
between tablespace and WITH/WHERE clauses.
Added tests to check the correct indexes definition.
In the previous commit skip_const was going ahead the space thus removing the
starting quote. Also fixed (and tested) trailing part after the tablespace
name, e.g. the WHERE clause.
Note: if original namespace is "foo bar", repack_indexdef gives a bad
result. This is weird as apparently skip_ident can deal with spaces in
a quoted identifier. Committing as I'm going home, will deal with that
later.
