vCPE vG-MUX- fix auto ugrade disable configuration
Move configuration of disabling auto upgrade to the
'build' phase of the install script.
Also, disable the setting in the /etc/apt/apt.conf.d/20auto-upgrades
file.
Auto upgrade of the kernel without associated packages can
cause vpp to stop working. This should help keep the demo
instances running without occasional failures.
Change-Id: Ief46bc7866a94d67fe2c3d2fe2d1f22bb4433aa9
Issue-ID: INT-63
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>