tests: Drop using /tmp/backups as destination dir

Instead use /var/backups for both local and remote backups to simplify
things.

Vagrantfile

@@ -23,10 +23,8 @@ Vagrant.configure("2") do |config|
       apt-get install -y borgbackup duplicity rdiff-backup restic rsync
       sed -i 's/^PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config
       systemctl reload sshd
-      mkdir /tmp/backups
-      mount -t tmpfs tmpfs /tmp/backups
-      chown vagrant: /tmp/backups
       echo -e "vagrant\nvagrant" | passwd vagrant
+      chown vagrant: /var/backups
     SHELL
   end
 
@@ -45,9 +43,6 @@ Vagrant.configure("2") do |config|
       ./configure --prefix=/usr --mandir=/usr/share/man --sysconfdir=/etc --localstatedir=/var --libdir=/usr/lib --libexecdir=/usr/lib
       make
       make install
-      mkdir /tmp/backups
-      mount -t tmpfs tmpfs /tmp/backups
-      chown vagrant: /tmp/backups
       mkdir -p /root/.ssh
       yes y | ssh-keygen -t ed25519 -f /root/.ssh/id_ed25519 -N ''
       echo "StrictHostKeyChecking accept-new" >> /root/.ssh/config

test/common.bash

@@ -80,3 +80,17 @@ setconfig() {
         crudini --set "${BATS_TMPDIR}/$1" $2 $3 "$4"
     fi
 }
+
+remote_command() {
+    ssh vagrant@bntest1 "$1"
+}
+
+cleanup_backups() {
+    umount /var/backups
+    mount -t tmpfs tmpfs /var/backups
+}
+
+cleanup_remote_backups() {
+    remote_command "sudo umount /var/backups"
+    remote_command "sudo mount -t tmpfs tmpfs /var/backups"
+}

test/rdiff.bats

@@ -5,10 +5,6 @@ begin_rdiff() {
     if [ ! -d /var/cache/bntest ]; then
         debootstrap --variant=minbase testing /var/cache/bntest
     fi
-    if [ ! -d /tmp/backups ]; then
-        mkdir /tmp/backups
-        mount -t tmpfs tmpfs /tmp/backups
-    fi
 }
 
 setup_rdiff() {
@@ -31,7 +27,7 @@ exclude = /var/cache/bntest/var
 
 [dest]
 type = local
-directory = /tmp/backups
+directory = /var/backups
 host =
 user =
 sshoptions = -4
@@ -41,8 +37,8 @@ EOF
 }
 
 finish_rdiff() {
-    rm -rf /tmp/backups/rdifftest
-    ssh vagrant@bntest1 "rm -rf /tmp/backups/rdifftest"
+    rm -rf /var/backups/rdifftest
+    ssh vagrant@bntest1 "rm -rf /var/backups/rdifftest"
 }
 
 @test "local source/dest backup action runs without errors" {