Fix naming of jobs and steps

Signed-off-by: Joas Schilling <coding@schilljs.com>

.github/workflows/oci.yml

-name: "Unit tests"
+name: PHPUnit
 
 on:
+  pull_request:
   push:
+    branches:
+      - master
+      - stable*
 
 jobs:
   phpunit-oci8:
-    name: "PHPUnit on OCI8"
-    runs-on: "ubuntu-latest"
+    runs-on: ubuntu-latest
 
     strategy:
+      # do not stop on another job's failure
+      fail-fast: false
       matrix:
-        php-version:
-          - "7.4"
+        php-versions: [ '7.4' ]
+        databases: [ 'oci' ]
+
+    name: php${{ matrix.php-versions }}-${{ matrix.databases }}
 
     services:
       oracle:
@@ -20,8 +27,8 @@ jobs:
           - "1521:1521"
 
     steps:
-      - name: "Checkout"
-        uses: "actions/checkout@v2"
+      - name: Checkout server
+        uses: actions/checkout@v2
 
       - name: Checkout submodules
         shell: bash
@@ -30,10 +37,10 @@ jobs:
           git submodule sync --recursive
           git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
 
-      - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+      - name: Set up php ${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@v2
         with:
-          php-version: "${{ matrix.php-version }}"
+          php-version: ${{ matrix.php-versions }}
           extensions: mbstring, iconv, fileinfo, intl, sqlite, pdo_sqlite, oci8
           tools: phpunit:8.5.2
           coverage: none
@@ -42,12 +49,8 @@ jobs:
         run: |
           mkdir data
           ./occ maintenance:install --verbose --database=oci --database-name=XE --database-host=127.0.0.1 --database-port=1521 --database-user=autotest --database-pass=owncloud --admin-user admin --admin-pass admin
-
-      # Generate instance id by loading index.php
-      - name: Generate instance id by loading index.php
-        run: |
           php -f index.php
 
-      - name: Run phpunit
-        run: |
-          cd tests && phpunit --configuration phpunit-autotest.xml --group DB,SLOWDB
+      - name: PHPUnit
+        working-directory: tests
+        run: phpunit --configuration phpunit-autotest.xml --group DB,SLOWDB