Add password to BIOS setup to prevent tenant users from making BIOS changes

[tzumainn]

Giving tenant users BIOS access has a lot of risks; it's better to just protect it from them.

We may want to do the following:

• add a BIOS password to one node
• verify that the node can still inspect/clean/provision normally
• if everything works, add to the rest of the nodes

[tzumainn]

I manually set a BIOS password, and verified that deploying/cleaning still worked. I think setting a BIOS password should be fine.

[hakasapl]

Okay, I will plan to implement this post-shutdown before we open up ESI to users

[hakasapl]

BIOS password has been added to all ESI fx2 nodes