Update maven.yml using PostgreSQL on build system

Update maven.yml using PostgreSQL on build system

.github/workflows/maven.yml

@@ -1,7 +1,7 @@
 # This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
 
-name: Java 8 CI with Maven and skipTests
+name: Ubuntu 20.04 Java 8 CI with Maven, PostgreSQL and skipTests option
 
 on:
   push:
@@ -12,26 +12,41 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     
-    services:
-      postgres:
-        image: postgres:latest
-        env:
-          POSTGRES_DB: libreplandev       
-          POSTGRES_PASSWORD: libreplan
-          POSTGRES_USER: libreplan
-        ports:
-          - 5432:5432
-        # Set health checks to wait until postgres has started
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
+#    services:
+#      postgres:
+#        image: postgres:latest
+#        env:
+#          POSTGRES_DB: libreplandev       
+#          POSTGRES_PASSWORD: libreplan
+#          POSTGRES_USER: libreplan
+#        ports:
+#          - 5432:5432
+#        # Set health checks to wait until postgres has started
+#        options: >-
+#          --health-cmd pg_isready
+#          --health-interval 10s
+#          --health-timeout 5s
+#          --health-retries 5
           
     steps:
     - uses: actions/checkout@v3
+    
+    - name: Start PostgreSQL on Ubuntu
+      run: |
+        sudo systemctl start postgresql.service
+        pg_isready
+    
+    - name: Create scheduler user
+      run: |
+        sudo -u postgres psql --command="CREATE USER libreplan PASSWORD 'libreplan'" --command="\du"
+    
+    - name: Create timetable database
+      run: |
+        sudo -u postgres createdb --owner=libreplan libreplan
+        PGPASSWORD=libreplan psql --username=libreplan --host=localhost --list libreplan
+
     - name: Set up JDK 8
       uses: actions/setup-java@v3
       with: