Set up CI with Azure Pipelines (#308)

* Set up CI with Azure Pipelines

* Update azure-pipelines.yml

* Update azure-pipelines.yml

azure-pipelines.yml

@@ -0,0 +1,21 @@
+# Gradle
+# Build your Java projects and run tests with Gradle using a Gradle wrapper script.
+# Add steps that analyze code, save build artifacts, deploy, and more:
+# https://docs.microsoft.com/vsts/pipelines/languages/java
+# https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/build/gradle?view=vsts
+
+pool:
+  vmImage: 'Ubuntu 16.04'
+
+steps:
+- task: Gradle@2
+  inputs:
+    workingDirectory: 'test_runner'
+    gradleWrapperFile: './test_runner/gradlew'
+    gradleOptions: '-Xmx3072m'
+    javaHomeOption: 'JDKVersion'
+    jdkVersionOption: '1.8'
+    jdkArchitectureOption: 'x64'
+    publishJUnitResults: false
+    testResultsFiles: '**/TEST-*.xml'
+    tasks: 'build'