cli: Fix cachegen aand cloudmonkey to generate api verbs, revert last commit

Fixes cachegen and reverts "mvn: fix cloudmonkey build"

This reverts commit 6d3de41d4262abeedab234a08e8fb5714b69a9bf.
Make maven use mkisofs or genisoimage depending on what is available

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>