Also check for IsConnFromDatanode() while deciding to use global snapshots
Also check for IsConnFromDatanode() while deciding to use global snapshots

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