Add support for new option in s3 plugin.

Change-Id: I294576b9c5083b8a56cdf53e682b6eecabf7e166
Task: 4223
Story: 2001025

jenkins_jobs/modules/publishers.py

@@ -4890,6 +4890,9 @@ def s3(registry, xml_parent, data):
         * **flatten** (`bool`) - Ignore the directory structure of the
           artifacts in the source project and copy all matching artifacts
           directly into the specified bucket. (default false)
+        * **dont-wait-for-concurrent-builds** (`bool`) - Don't wait
+          for completion of concurrent builds before publishing to S3
+          (default false)
     :arg list metadata-tags:
       :metadata-tags:
         * **key** Metadata key for files from this build. It will be
@@ -4923,7 +4926,9 @@ def s3(registry, xml_parent, data):
                     ('uploadFromSlave', 'upload-from-slave', False),
                     ('managedArtifacts', 'managed-artifacts', False),
                     ('useServerSideEncryption', 's3-encryption', False),
-                    ('flatten', 'flatten', False)]
+                    ('flatten', 'flatten', False),
+                    ('dontWaitForConcurrentBuildCompletion',
+                     'dont-wait-for-concurrent-builds', False)]
 
         for xml_key, yaml_key, default in settings:
             xml_config = XML.SubElement(fileset, xml_key)

tests/publishers/fixtures/s3001.xml

@@ -14,6 +14,7 @@
           <managedArtifacts>true</managedArtifacts>
           <useServerSideEncryption>true</useServerSideEncryption>
           <flatten>true</flatten>
+          <dontWaitForConcurrentBuildCompletion>true</dontWaitForConcurrentBuildCompletion>
         </hudson.plugins.s3.Entry>
       </entries>
       <userMetadata>

tests/publishers/fixtures/s3001.yaml

@@ -11,6 +11,7 @@ publishers:
           managed-artifacts: true
           s3-encryption: true
           flatten: true
+          dont-wait-for-concurrent-builds: true
       metadata-tags:
         - key: warbl ${garbl}
           value: herp derp weevils