base-config BGP - add missing config

geant/gap_ansible/roles/base_config/templates/routers/nokia/router/bgp.j2

@@ -7,6 +7,7 @@
                 </local-as>
                 <group alu:operation="replace">
                     <group-name>iGEANT-P-ONLY</group-name>
+                    <authentication-key>aX1kndQNDTAHyJttsnoyKVBRm1bxaCpuK+c= hash2</authentication-key>
                     <admin-state>enable</admin-state>
                     <next-hop-self>true</next-hop-self>
                     <type>internal</type>
@@ -23,6 +24,7 @@
                     <next-hop-self>true</next-hop-self>
                     <type>internal</type>
                     <peer-as>{{ geant_re_as_number }}</peer-as>
+                    <capability-negotiation>true</capability-negotiation>
                     <local-address>{{ lo_ipv6_address }}</local-address>
                     <family>
                         <mcast-ipv6>true</mcast-ipv6>