~ubuntu-server subscription changes

[robie.basak at canonical.com]

The following subscriptions are superfluous:
  autofs5
  backports.functools-lru-cache
  billiard
  cgmanager
  dh-php
  ec2-ami-tools
  ec2-api-tools
  euca2ools
  golang
  golang-1.6
  golang-1.6-race-detector-runtime
  golang-check.v1
  golang-context
  golang-dbus
  golang-github-bmizerany-assert
  golang-github-bmizerany-pat
  golang-github-gorilla-mux
  golang-github-mattn-go-colorable
  golang-github-mattn-go-isatty
  golang-github-mattn-go-sqlite3
  golang-github-olekukonko-tablewriter
  golang-github-pborman-uuid
  golang-go-dbus
  golang-go.crypto
  golang-go.net-dev
  golang-gocapability-dev
  golang-golang-x-net-dev
  golang-gopkg-flosch-pongo2.v3
  golang-gopkg-inconshreveable-log15.v2
  golang-gopkg-lxc-go-lxc.v2
  golang-gopkg-tomb.v2
  golang-juju-loggo
  golang-petname
  golang-pretty
  golang-text
  golang-x-text
  golang-yaml.v2
  iptraf
  iscsitarget
  jakarta-taglibs-standard
  juju
  juju-core
  juju-mongodb
  libibverbs
  librdmacm
  lua-lpeg
  mdbtools
  monitoring-plugins
  nagios-images
  nagios-nrpe
  nagios-plugins
  nagios3
  ndg-httpsclient
  nose
  openbsd-inetd
  php-xmlrpc
  php7.0
  php7.3
  postgresql-9.5
  powernap
  python-kajiki
  python-requestbuilder
  python-termstyle
  python-tornado
  python3-chardet
  qemu-kvm
  ruby
  ruby2.3
  tickcount
  tomcat8
  ubuntu-cloudimage-keyring
  xinetd
  yui3
Superfluous subscriptions removed