James Slagle a7955832df Honor --skip-deploy-identifier in common deploy tasks
To match the previous functionality when not using config-download, the
common deploy step tasks should be skipped for already deployed nodes
when using --skip-deploy-identifier.

This patch adds a task to check if one of the json configuration files
created by the common tasks already exists. If it does, and
--skip-deploy-identifier has caused an empty DeployIdentifier parameter
value, the tasks will be skipped for that node.

Change-Id: I711dbb00a9c34dbd96ef179ef41bff281b0001d1
Closes-Bug: #1796924
2018-10-09 11:55:13 -04:00
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