Update Variable Naming Convention

Variables in qemu-build.sh, build-jenkins.sh, build-setup.sh,
and kubernetes-launch.sh updated to use the same convention across
different scripts.

Change-Id: Ice9ef2f47b0fbf125eadd235f63b79abafdc2dd7
Signed-off-by: Alanny Lopez <alannyglopez@gmail.com>
11 files changed