Merge #1951 from shapeblue:4930-upgradepath to apache:4.9

CLOUDSTACK-9792: Add upgrade path for 4.9.3.0

This adds an upgrade path from 4.9.2.0 to 4.9.3.0, this also includes
changes from PR #1928 that adds missing hypervisor capability in
4.9/4.10+. This also fixes a db-cleanup path sequence issues, with that
puts 4.10 after 4.1.0, and before 4.2.0.

Once validated I can help merge this on master, since this will cause
merge conflicts on fwd-merging.

Ping - @syed @karuturi @borisstoyanov @DaanHoogland @abhinandanprateek

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr