Currently the repo generation with "osm repo-index" fails due to
bug 1493. Because of that, the gitlab CI pipeline fails. This change
disables the repo generation until the bug is fixed.

Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

With the standardization of pip in all modules, the dependencies
of IM and osmclient are stored in requirements.txt and must be
installed from that file.

Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

Changes from latest published package of the osmclient
to building the latest from source

Adds charm-packages contents to full index

Installs OSM client to perform repo-index
Moves the Magma subfolder content to the top level so it will be
included in the final build
Calls osm repo-index to build all packages and index
Uses sftp to publish content to https://osm.etsi.org/vnf-catalog/Testing/