Revert "Allow VIEWs to be created on datanodes as well."
Revert "Allow VIEWs to be created on datanodes as well."

"make installcheck" showed issues with temporary views. So
need to handle that properly as well. I did not see a quick
band-aid fix so reverting this commit for now.

This reverts commit d774b0f58b0c7922e97f50436f50887c47b025ba.

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