BUG-429 : Topology provider rework to use lsp name instead of PLSPID as key.

Change-Id: Ib36dbdca734bc997e1d03f611a0c9c1b2076689a
Signed-off-by: Dana Kutenicsova <dkutenic@cisco.com>
Signed-off-by: Robert Varga <rovarga@cisco.com>