Avoid renaming data directory during MSVC upgrade testing.
Avoid renaming data directory during MSVC upgrade testing.

This appears to cause some intermittent file system problems
on Windows 8. Instead, set up the old data directory in its
intended final location to start with.

arcivanov/postgres-xl,postmind-net/postgres-xl,snaga/postgres-xl,postmind-net/postgres-xl,snaga/postgres-xl,kmjungersen/PostgresXL,snaga/postgres-xl,postmind-net/postgres-xl,arcivanov/postgres-xl,kmjungersen/PostgresXL,arcivanov/postgres-xl,arcivanov/postgres-xl,postmind-net/postgres-xl,kmjungersen/PostgresXL,arcivanov/postgres-xl,kmjungersen/PostgresXL,snaga/postgres-xl,snaga/postgres-xl,arcivanov/postgres-xl,kmjungersen/PostgresXL,postmind-net/postgres-xl