Ensure no etcd server is running before acceptance tests

Otherwise acceptance tests can't spin up new etcd server which use
same port.

Closes: #1027707

debian/tests/acceptance

@@ -44,6 +44,13 @@ case $DEB_HOST_ARCH in
 		;;
 esac
 
+# ensure no etcd server is running.
+if [ $(id -u) -eq 0 ]
+then
+	service etcd stop
+	service etcd status || true
+fi
+
 set -x
 for PG_VERSION in $(ls -1r /usr/lib/postgresql/); do
 	echo "### PostgreSQL $PG_VERSION acceptance-$DCS $@ ###"

debian/tests/control

@@ -22,7 +22,7 @@ Depends:
  python3-etcd (>= 0.4.3),
  @,
 Test-Command: debian/tests/acceptance etcd features/basic_replication.feature
-Restrictions: allow-stderr
+Restrictions: needs-root, allow-stderr
 
 Features: test-name=acceptance-etcd
 Depends:
@@ -34,7 +34,7 @@ Depends:
  python3-etcd (>= 0.4.3),
  @,
 Test-Command: debian/tests/acceptance etcd
-Restrictions: allow-stderr, flaky
+Restrictions: needs-root, allow-stderr, flaky
 
 # consul
 Features: test-name=acceptance-consul