IFMapLinkTable works differently in the agent

Change-Id: I8cb65c2fdff3976cdca6b24733c430dd4efb3201
IFMapLinkTable has a different name in the agent

Change-Id: Ieddd30c5d2b034ffbe1d11e1be5ebceeb6f6ff8f
Use the correct link_table; fix table lookup; cleanup listeners before existing

Change-Id: I1cfc97c9bc10e6a5d43f767963a06f20ba7d46c7