Change srsLTE to Full Native Charm

Changes the charm from relying on a prepackaged image to
building srsue and srsenb from tagged source.
Updates the descriptor to use generic name for relation.
Signed-off-by: beierlm <mark.beierl@canonical.com>

magma/hackfest_magma-agw-enb_vnfd/charms/srs-enb-ue/venv/netaddr-0.8.0.dist-info/AUTHORS

+- David P. D. Moss (author, maintainer) drkjam@gmail.com
+- Stefan Nordhausen (maintainer) stefan.nordhausen@immobilienscout24.de
+- Jakub Stasiak (maintainer) jakub@stasiak.at
+
+Released under the BSD License (see :doc:`license` for details).

magma/hackfest_magma-agw-enb_vnfd/charms/srs-enb-ue/venv/netaddr-0.8.0.dist-info/INSTALLER

+pip

magma/hackfest_magma-agw-enb_vnfd/charms/srs-enb-ue/venv/netaddr-0.8.0.dist-info/WHEEL

+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+

magma/hackfest_magma-agw-enb_vnfd/charms/srs-enb-ue/venv/netaddr-0.8.0.dist-info/entry_points.txt

+[console_scripts]
+netaddr = netaddr.cli:main
+

magma/hackfest_magma-agw-enb_vnfd/charms/srs-enb-ue/venv/netaddr-0.8.0.dist-info/top_level.txt

+netaddr