SDP description - use far-end PE FQDN

geant/gap_ansible/roles/bc_templates/routers/nokia/sdp_mesh.j2

@@ -5,7 +5,7 @@
         <sdp>
             <sdp-id>{{ sdp_id }}</sdp-id>
             <admin-state>enable</admin-state>
-            <description>SDP_{{ sdp_id }}</description>
+            <description>{{ pe_fqdn }}</description>
             <delivery-type>mpls</delivery-type>
             <path-mtu>{{ sdp_type.path_mtu }}</path-mtu>
             {% if sdp_type.signaling is defined %}