removing old & unused test data

test/data/mx1.ams.nl.geant.net-bgp.output

test/data/mx1.ams.nl.geant.net-bgpv4.output

test/data/mx1.ams.nl.geant.net-bgpv6.output

test/data/mx1.ams.nl.geant.net-interfaces.output

test/data/mx1.ams.nl.geant.net-netconf.xml

test/data/mx1.ams.nl.geant.net-vrr.output

test/data/mx1.ath2.gr.geant.net-bgp.output

test/data/mx1.ath2.gr.geant.net-bgpv4.output

test/data/mx1.ath2.gr.geant.net-bgpv6.output

test/data/mx1.ath2.gr.geant.net-interfaces.output

test/data/mx1.ath2.gr.geant.net-netconf.xml

test/data/mx1.ath2.gr.geant.net-vrr.output

test/data/mx1.buc.ro.geant.net-bgp.output

test/data/mx1.buc.ro.geant.net-bgpv4.output

test/data/mx1.buc.ro.geant.net-bgpv6.output

test/data/mx1.buc.ro.geant.net-interfaces.output

test/data/mx1.buc.ro.geant.net-netconf.xml

test/data/mx1.buc.ro.geant.net-vrr.output

test/data/mx1.bud.hu.geant.net-bgp.output

test/data/mx1.bud.hu.geant.net-bgpv4.output