Run Jobs in Parallel

trigger:
- master
jobs:
- job:
  pool:
    vmImage: 'ubuntu-latest'
  strategy:
    matrix:
      Tests_High:
        TestsPriority: "High"
      Tests_Medium:
        TestsPriority: "Medium"
      Tests_Low:
        TestsPriority: "Low"
    maxParallel: 3   <-----------
    
  steps:
    - task: Bash@3
      displayName: "create browser variable"
      inputs:
        targetType: 'inline'
        script: |            
          export BROWSER=$(BROWSER)
   - task: Maven@3
     inputs:
      mavenPomFile: 'pom.xml'
      mavenOptions: '-Xmx3072m'
      javaHomeOption: 'JDKVersion'
      jdkVersionOption: '1.8'
      jdkArchitectureOption: 'x64'
      publishJUnitResults: true
      testResultsFiles: '**/surefire-reports/TEST-*.xml'
      goals: 'clean test -Dgroups=$(TestsPriority)'
   - task: PublishBuildArtifacts@1
     displayName: 'Publish Log File as Artifact'
     inputs:         
       PathtoPublish: $(System.DefaultWorkingDirectory)/target/logs
       ArtifactName: 'logs_$(TestsPriority)'
   - task: PublishBuildArtifacts@1
     displayName: 'Publish Screenshots as Artifact'
     inputs:         
       PathtoPublish: $(System.DefaultWorkingDirectory)/target/screenshots
       ArtifactName: 'screenshots_$(TestsPriority)'