BIGTOP-3483. Upgrade R version on Ubuntu 18.04. (#720)
BIGTOP-3483. Upgrade R version on Ubuntu 18.04. (#720)


sekikn/bigtop,sekikn/bigtop,sekikn/bigtop,apache/bigtop,JunHe77/bigtop,JunHe77/bigtop,apache/bigtop,sekikn/bigtop,apache/bigtop,JunHe77/bigtop,sekikn/bigtop,apache/bigtop,apache/bigtop,JunHe77/bigtop