CI: use vagrant scripts for import tests

Use vanilla docker images of Ubuntu and leave the setup
to the vagrant scripts. Then do the usual import tests.

Also fixes a couple of issues found with the scripts

.github/workflows/vagrant-scripts.yml

@@ -0,0 +1,152 @@
+name: Install scripts
+
+on: [ push, pull_request ]
+
+jobs:
+    create-archive:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+              with:
+                submodules: true
+
+            - name: Get Date
+              id: get-date
+              run: |
+                  echo "::set-output name=date::$(/bin/date -u "+%Y%W")"
+              shell: bash
+
+            - uses: actions/cache@v2
+              with:
+                  path: |
+                     data/country_grid.sql.gz
+                  key: nominatim-country-data-${{ steps.get-date.outputs.date }}
+
+            - name: Package tarball
+              run: |
+                  if [ ! -f data/country_grid.sql.gz ]; then
+                      wget --no-verbose -O data/country_grid.sql.gz https://www.nominatim.org/data/country_grid.sql.gz
+                  fi
+                  cd ..
+                  tar cjf nominatim-src.tar.bz2 Nominatim
+                  mv nominatim-src.tar.bz2 Nominatim
+
+            - name: 'Upload Artifact'
+              uses: actions/upload-artifact@v2
+              with:
+                  name: full-source
+                  path: nominatim-src.tar.bz2
+                  retention-days: 1
+
+
+    ubuntu:
+        runs-on: ubuntu-latest
+        needs: create-archive
+
+        strategy:
+            matrix:
+                ubuntu: [18, 20]
+                include:
+                    - ubuntu: 18
+                      install_mode:
+                    - ubuntu: 20
+                      install_mode: install-apache
+
+        container:
+            image: ubuntu:${{ matrix.ubuntu }}.04
+
+        defaults:
+            run:
+                shell: sudo -Hu nominatim bash --noprofile --norc -eo pipefail {0}
+
+        steps:
+            - name: Prepare container
+              run: |
+                  export APT_LISTCHANGES_FRONTEND=none
+                  export DEBIAN_FRONTEND=noninteractive
+                  apt-get update -qq
+                  apt-get install -y git sudo wget
+                  ln -snf /usr/share/zoneinfo/$CONTAINER_TIMEZONE /etc/localtime && echo $CONTAINER_TIMEZONE > /etc/timezone
+              shell: bash
+
+            - name: Setup import user
+              run: |
+                  useradd -m nominatim -G sudo
+                  echo '%sudo   ALL=(ALL:ALL) NOPASSWD: ALL' > /etc/sudoers.d/nopasswd
+                  echo "/home/nominatim/Nominatim/vagrant/Install-on-Ubuntu-$UBUNTU.sh no $INSTALL_MODE" > /home/nominatim/vagrant.sh
+              shell: bash
+              env:
+                UBUNTU: ${{ matrix.ubuntu }}
+                INSTALL_MODE: ${{ matrix.install_mode }}
+
+            - uses: actions/download-artifact@v2
+              with:
+                  name: full-source
+                  path: /home/nominatim
+
+            - name: Get Date
+              id: get-date
+              run: |
+                  echo "::set-output name=date::$(/bin/date -u "+%Y%W")"
+              shell: bash
+
+            - name: Install Nominatim
+              run: |
+                export USERNAME=nominatim
+                export USERHOME=/home/nominatim
+                export NOSYSTEMD=yes
+                tar xf nominatim-src.tar.bz2
+                . vagrant.sh
+              working-directory: /home/nominatim
+
+            - uses: actions/cache@v2
+              with:
+                  path: |
+                     monaco-latest.osm.pbf
+                  key: nominatim-test-data-${{ steps.get-date.outputs.date }}
+
+            - name: Prepare import environment
+              run: |
+                  if [ ! -f monaco-latest.osm.pbf ]; then
+                      wget --no-verbose https://download.geofabrik.de/europe/monaco-latest.osm.pbf
+                  fi
+                  mkdir data-env data-env-reverse
+                  chown nominatim. data-env data-env-reverse
+              shell: bash
+
+            - name: Import
+              run: nominatim import --osm-file ../monaco-latest.osm.pbf
+              working-directory: data-env
+
+            - name: Import special phrases
+              run: nominatim special-phrases --import-from-wiki
+              working-directory: data-env
+
+            - name: Check full import
+              run: nominatim admin --check-database
+              working-directory: data-env
+
+            - name: Warm up database
+              run: nominatim admin --warm
+              working-directory: data-env
+
+            - name: Run update
+              run: |
+                  sudo apt-get install -y python3-pip
+                  pip3 install --user osmium
+                  nominatim replication --init
+                  NOMINATIM_REPLICATION_MAX_DIFF=1 nominatim replication --once
+              working-directory: data-env
+
+            - name: Run reverse-only import
+              run : |
+                  echo 'NOMINATIM_DATABASE_DSN="pgsql:dbname=reverse"' > .env
+                  nominatim import --osm-file ../monaco-latest.osm.pbf --reverse-only --no-updates
+              working-directory: data-env-reverse
+              env:
+                  NOMINATIM_DATABASE_DSN: pgsql:dbname=reverse
+
+            - name: Check reverse import
+              run: nominatim admin --check-database
+              working-directory: data-env-reverse