Fix a few expected output diffs in testcase 'matview'
Fix a few expected output diffs in testcase 'matview'

There are more failures which need to be examined and fixed if needed

zeroae/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,techdragon/Postgres-XL,ovr/postgres-xl,ovr/postgres-xl,techdragon/Postgres-XL,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,zeroae/postgres-xl,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,yazun/postgres-xl,yazun/postgres-xl,zeroae/postgres-xl,techdragon/Postgres-XL,oberstet/postgres-xl,oberstet/postgres-xl,pavanvd/postgres-xl,zeroae/postgres-xl,yazun/postgres-xl,yazun/postgres-xl,yazun/postgres-xl,techdragon/Postgres-XL,pavanvd/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,zeroae/postgres-xl,Postgres-XL/Postgres-XL