Automated way to build a bootable linux image for use by the Manila generic driver.

Gerrit User 22348 b312e8637e Update patch set 1 ... Patch Set 1: -Verified Starting gate jobs. Patch-set: 1 Tag: autogenerated:zuul:gate Reviewer: Gerrit User 22348 <22348@4a232e18-c5a9-48ee-94c0-e04e7cca6543> Label: Verified=0		2021-08-13 11:24:30 +00:00