Free ignorelist after each regression test schedule.
Free ignorelist after each regression test schedule.

It's a trivial amount of RAM held until the end of the regression
test run; but it's probably worth fixing to silence future warnings
from code analyzers.

This was the only memory leak pointed out by clang's static code
analysis tool.

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