mergeRegionsAsync admin API with two regions as parameters deprecated since 2.3.0 and removed from 4.0 merge_region shell command now supports multiple regions merge since 2.3.0 & 3.0.0 Signed-off-by: Viraj Jasani <vjasani@apache.org> Signed-off-by: Esteban Gutierrez <esteban@apache.org> Signed-off-by: Josh Elser <elserj@apache.org> (cherry picked from commit 5f61df479260598ea8f7856b4abc2541c27ed5db)