Update YAML formatting (#3033)

- Update whitespace to match Prettier formatting
- Add .prettierrc.yml
- Part of Azure/azure-sdk#225

.azure-pipelines/.prettierrc.yml

@@ -0,0 +1 @@
+singleQuote: true

.azure-pipelines/client.test.live.yml

@@ -1,41 +1,41 @@
 jobs:
-- job: 'LiveTest'
+  - job: 'LiveTest'
 
-  strategy:
-    matrix:
-      AzureBatch:
-        pomFilePath: './batch/data-plane/pom.xml'
-      AzureKeyVault:
-        pomFilePath: './keyvault/data-plane/pom.xml'
+    strategy:
+      matrix:
+        AzureBatch:
+          pomFilePath: './batch/data-plane/pom.xml'
+        AzureKeyVault:
+          pomFilePath: './keyvault/data-plane/pom.xml'
 
-  pool:
-    vmImage: 'vs2017-win2016'
+    pool:
+      vmImage: 'vs2017-win2016'
 
-  steps:
-  # Adding -Dmaven.wagon.http.pool=false to the mvn command as a workaround to prevent build failures at maven artifacts downloading stage.
-  - task: Maven@3
-    displayName: 'Run Live tests'
-    inputs:
-      mavenPomFile: $(pomFilePath)
-      options: '--batch-mode -Dmaven.wagon.http.pool=false -Dsurefire.rerunFailingTestsCount=3'
-      mavenOptions: '-Xmx3072m -Dorg.slf4j.simpleLogger.defaultLogLevel=error -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn'
-      javaHomeOption: 'JDKVersion'
-      jdkVersionOption: '1.8'
-      jdkArchitectureOption: 'x64'
-      publishJUnitResults: false
-      goals: 'test'
-    env:
-      ARM_CLIENTID: $(java-keyvault-test-arm-client-id)
-      ARM_CLIENTKEY: $(java-keyvault-test-arm-client-key)
-      AZURE_TEST_MODE: RECORD
-      AZURE_BATCH_ACCOUNT: $(java-batch-test-account-name)
-      AZURE_BATCH_ACCESS_KEY: $(java-batch-test-account-access-key)
-      STORAGE_ACCOUNT_KEY: $(java-batch-test-storage-account-key)
-      STORAGE_ACCOUNT_NAME: $(java-batch-test-storage-account-name)
-      AZURE_BATCH_ENDPOINT: https://servbatch.centralus.batch.azure.com
+    steps:
+      # Adding -Dmaven.wagon.http.pool=false to the mvn command as a workaround to prevent build failures at maven artifacts downloading stage.
+      - task: Maven@3
+        displayName: 'Run Live tests'
+        inputs:
+          mavenPomFile: $(pomFilePath)
+          options: '--batch-mode -Dmaven.wagon.http.pool=false -Dsurefire.rerunFailingTestsCount=3'
+          mavenOptions: '-Xmx3072m -Dorg.slf4j.simpleLogger.defaultLogLevel=error -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn'
+          javaHomeOption: 'JDKVersion'
+          jdkVersionOption: '1.8'
+          jdkArchitectureOption: 'x64'
+          publishJUnitResults: false
+          goals: 'test'
+        env:
+          ARM_CLIENTID: $(java-keyvault-test-arm-client-id)
+          ARM_CLIENTKEY: $(java-keyvault-test-arm-client-key)
+          AZURE_TEST_MODE: RECORD
+          AZURE_BATCH_ACCOUNT: $(java-batch-test-account-name)
+          AZURE_BATCH_ACCESS_KEY: $(java-batch-test-account-access-key)
+          STORAGE_ACCOUNT_KEY: $(java-batch-test-storage-account-key)
+          STORAGE_ACCOUNT_NAME: $(java-batch-test-storage-account-name)
+          AZURE_BATCH_ENDPOINT: https://servbatch.centralus.batch.azure.com
 
-  - task: PublishTestResults@2
-    condition: succeededOrFailed()
-    inputs:
-      mergeTestResults: true
-      testRunTitle: 'Live tests for $(pomFilePath)'
+      - task: PublishTestResults@2
+        condition: succeededOrFailed()
+        inputs:
+          mergeTestResults: true
+          testRunTitle: 'Live tests for $(pomFilePath)'