Updated ELX dea.yaml to use Ubuntu cache
Updated ELX dea.yaml to use Ubuntu cache

The dea.yaml for elx_no_ha now uses the corrected package cache
mechanism introduced in https://gerrit.opnfv.org/gerrit/#/c/2035/1.

Signed-off-by: Stefan Berg <45491f3cd9a10c08cd7482c5143b6462c793b8df@consultron.com>

jonasbjurel/OPNFV-Playground,jonasbjurel/OPNFV-Playground,jonasbjurel/OPNFV-Playground