Updating documentation for El Alto

Removing necessity of merging docker data lists manually as it's already
solved in the build_nexus_blob.sh script

Updating all links and references to El Alto

Issue-ID: OOM-2016

Change-Id: I1e343a8af1d26f7f6f80a8d76fa7997883b678e4
Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>
2 files changed