Add Sample code to create a spark job with the azure synapse-spark client library.

[ouphi]

Add Sample code showing how to submit a spark job to an existing pool, with the azure synapse-spark client library.
This example works with a pyspark script stored in Azure Blob File System.

[opbld32]

Learn Build status updates of commit c9575bf:

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File	Status	Preview URL	Details
docs-ref-services/preview/synapse-spark-readme.md	⚠️Warning	View (azure-node-preview)	Details

docs-ref-services/preview/synapse-spark-readme.md

• Line 0, Column 0: [Warning: h1-missing - See documentation] H1 is required. Use a single hash (#) followed by a space to create your top-level heading.
• Line 2, Column 1: [Warning: ms-prod-and-service - See documentation] Only one of the following attributes can exist: 'ms.prod', 'ms.service'. Use ms.prod for on-premise products, or ms.service for cloud services.
• Line 9, Column 16: [Warning: ms-prod-technology-invalid - See documentation] Invalid value for 'ms.technology': 'azure' is not valid with 'ms.prod' value 'azure'.
• Line 11, Column 13: [Warning: ms-service-subservice-invalid - See documentation] Invalid value for 'ms.service': 'synapseanalytics'.
• Line 89, Column 1: [Warning: duplicate-alt-text - See documentation] Alt text 'Impressions' is duplicated. Within an article, alt text must be unique.
• Line 109, Column 1: [Warning: duplicate-alt-text - See documentation] Alt text 'Impressions' is duplicated. Within an article, alt text must be unique.
• Line 2, Column 1: [Suggestion: description-missing - See documentation] Missing required attribute: 'description'.
• Line 5, Column 12: [Suggestion: ms-author-invalid - See documentation] Invalid value for 'ms.author', 'ramyar' is not a valid Microsoft alias.

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