[Linaro-validation] salt scripts

Hey Guys,

I've just proposed merging:

https://code.launchpad.net/~doanac/lava-lab/lava-scripts/+merge/146547

I suspect this may need a couple of rounds of feedback. However, its a pretty exciting changeset. In the end, you can run some very simple commands like:

# creates a new worker node instance called "staging" on # minion(lava-test) minion-ip(192.168.0.145) ./lava-add-worker lava-test 192.168.0.145 staging

# upgrade a lava deployment. this will: # - shutdown all worker node instances # - upgrade the master instance # - upgrade all worker nodes # - bring all worker nodes back online ./lava-upgrade production

It needs more testing, but I wanted to get some early input before spending any more time on it.