Fix for regression test create_index
Fix for regression test create_index

XC does not support yet concurrent index, TEMP table and INTO clause,
so this output is correct.

Query plan is set now as a Data node scan.

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