fuel, docs: fuel-menu: Align defaults with OPNFV

fuel, docs: fuel-menu: Align defaults with OPNFV

Since Armband alters the bootstrap package list and/or kernel version,
hanlded previously by fuel_bootstrap_cli.yaml, we need to refactor our
patches a bit.

NOTE: deploy-cache: We no longer include bootstrap package list in the
bootstrap fingerprint; we only rely on the repo mirrors fingerprints,
since bootstrap package list is mostly static across release cycles.

Upstream-bug: https://bugs.launchpad.net/fuel/+bug/1679636

JIRA: FUEL-266
JIRA: ARMBAND-225

Change-Id: I6c1b090df6eff69d60fa7ca779b3dde527e77879
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>