Fix for regression test copy2
Fix for regression test copy2

SERIAL and TEMP table are not yet supported by Postgres-XC,
so this output is correct.
It may be necessary to write additional test cases for Postgres-XC
in the case of copy.

arcivanov/postgres-xl,ovr/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,oberstet/postgres-xl,postmind-net/postgres-xl,yazun/postgres-xl,yazun/postgres-xl,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,snaga/postgres-xl,ovr/postgres-xl,snaga/postgres-xl,pavanvd/postgres-xl,techdragon/Postgres-XL,postmind-net/postgres-xl,ovr/postgres-xl,pavanvd/postgres-xl,yazun/postgres-xl,techdragon/Postgres-XL,kmjungersen/PostgresXL,postmind-net/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,kmjungersen/PostgresXL,techdragon/Postgres-XL,kmjungersen/PostgresXL,snaga/postgres-xl,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,techdragon/Postgres-XL,postmind-net/postgres-xl,snaga/postgres-xl,oberstet/postgres-xl,ovr/postgres-xl,yazun/postgres-xl,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,zeroae/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,oberstet/postgres-xl,snaga/postgres-xl,oberstet/postgres-xl,kmjungersen/PostgresXL,pavanvd/postgres-xl,kmjungersen/PostgresXL,postmind-net/postgres-xl,Postgres-XL/Postgres-XL,zeroae/postgres-xl,Postgres-XL/Postgres-XL,yazun/postgres-xl,ovr/postgres-xl,techdragon/Postgres-XL,pavanvd/postgres-xl,oberstet/postgres-xl