Add missing reset of need_initialization in reloptions code.
Add missing reset of need_initialization in reloptions code.

This resulted in useless extra work during every call of parseRelOptions,
but no bad effects other than that.  Noted by Alvaro.

pavanvd/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,arcivanov/postgres-xl,postmind-net/postgres-xl,xinzweb/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,zeroae/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,yazun/postgres-xl,lisakowen/gpdb,adam8157/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,ovr/postgres-xl,50wu/gpdb,ashwinstar/gpdb,adam8157/gpdb,techdragon/Postgres-XL,ovr/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,50wu/gpdb,oberstet/postgres-xl,kmjungersen/PostgresXL,arcivanov/postgres-xl,greenplum-db/gpdb,xinzweb/gpdb,xinzweb/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,arcivanov/postgres-xl,pavanvd/postgres-xl,snaga/postgres-xl,jmcatamney/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,snaga/postgres-xl,arcivanov/postgres-xl,postmind-net/postgres-xl,50wu/gpdb,pavanvd/postgres-xl,postmind-net/postgres-xl,ashwinstar/gpdb,adam8157/gpdb,50wu/gpdb,xinzweb/gpdb,snaga/postgres-xl,yazun/postgres-xl,greenplum-db/gpdb,jmcatamney/gpdb,tpostgres-projects/tPostgres,lisakowen/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,adam8157/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,ovr/postgres-xl,xinzweb/gpdb,jmcatamney/gpdb,yazun/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,greenplum-db/gpdb,lisakowen/gpdb,tpostgres-projects/tPostgres,ashwinstar/gpdb,50wu/gpdb,greenplum-db/gpdb,xinzweb/gpdb,zeroae/postgres-xl,greenplum-db/gpdb,jmcatamney/gpdb,tpostgres-projects/tPostgres,50wu/gpdb,oberstet/postgres-xl,50wu/gpdb,pavanvd/postgres-xl,tpostgres-projects/tPostgres,postmind-net/postgres-xl,kmjungersen/PostgresXL,kmjungersen/PostgresXL,zeroae/postgres-xl,lisakowen/gpdb,ovr/postgres-xl,kmjungersen/PostgresXL,xinzweb/gpdb,pavanvd/postgres-xl,yazun/postgres-xl,Postgres-XL/Postgres-XL,ashwinstar/gpdb,ovr/postgres-xl,postmind-net/postgres-xl,adam8157/gpdb,adam8157/gpdb,50wu/gpdb,snaga/postgres-xl,techdragon/Postgres-XL,snaga/postgres-xl,lisakowen/gpdb,jmcatamney/gpdb,arcivanov/postgres-xl