Java SDK 1.13.0

• Azure Redis cache: Fixes Azure/azure-libraries-for-net#303, Azure/azure-libraries-for-net#304, Azure/azure-libraries-for-net#305
• App Service: updated to API 2018-02-01; Support zip deploy, HTTPS only, HTTP 2.0, virtual applications
• Support Deployment.beginCreateAsync()
• Support automatic retrying on error messages containing "try again after '##' seconds".

For a complete list of changes and commits, please see v1.12.0...v1.13.0.