Simplify addJsonbToParseState()
Simplify addJsonbToParseState()

This function no longer needs to walk non-scalar structures passed to
it, following commit 54547bd87f49326d67051254c363e6597d16ffda.

Postgres-XL/Postgres-XL,lisakowen/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,zeroae/postgres-xl,50wu/gpdb,yazun/postgres-xl,50wu/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,xinzweb/gpdb,techdragon/Postgres-XL,adam8157/gpdb,ovr/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,yazun/postgres-xl,50wu/gpdb,Postgres-XL/Postgres-XL,lisakowen/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,yazun/postgres-xl,ashwinstar/gpdb,ashwinstar/gpdb,ovr/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,yazun/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,jmcatamney/gpdb,lisakowen/gpdb,xinzweb/gpdb,50wu/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,xinzweb/gpdb,yazun/postgres-xl,oberstet/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,oberstet/postgres-xl,techdragon/Postgres-XL,greenplum-db/gpdb,oberstet/postgres-xl,adam8157/gpdb,ashwinstar/gpdb,ovr/postgres-xl,lisakowen/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,pavanvd/postgres-xl,adam8157/gpdb,ovr/postgres-xl,greenplum-db/gpdb,lisakowen/gpdb,xinzweb/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,jmcatamney/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,50wu/gpdb,techdragon/Postgres-XL,adam8157/gpdb,jmcatamney/gpdb,zeroae/postgres-xl,50wu/gpdb,greenplum-db/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,xinzweb/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,50wu/gpdb,lisakowen/gpdb,50wu/gpdb,zeroae/postgres-xl,adam8157/gpdb