Fix for regression test truncate
Fix for regression test truncate

Postgres-XC does not support yet SERIAL, TRIGGER and
INHERITS based on multiple parents for distributed tables,
so this output is correct.

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