Adding 'switches' to gradle

This change adds the ability to specify switches to be passed to
gradle.  This change was only two functional code lines and
several lines of documentation.  The only file that changed was
builders.py

Change-Id: Idb1199cd4a63e6fbfdabe57cf50a8b431dd9e914
Reviewed-on: https://review.openstack.org/25929
Reviewed-by: Tollef Fog Heen <tfheen@varnish-software.com>
Reviewed-by: Arnaud Fabre <fabre.arnaud@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins

jenkins_jobs/modules/builders.py

@@ -444,6 +444,7 @@ def gradle(parser, xml_parent, data):
     :arg str tasks: List of tasks to execute
     :arg bool wrapper: use gradle wrapper (default false)
     :arg bool executable: make gradlew executable (default false)
+    :arg list switches: Switches for gradle, can have multiples
 
     Example::
 
@@ -451,6 +452,9 @@ def gradle(parser, xml_parent, data):
         - gradle:
             wrapper: true
             executable: true
+            switches:
+              - "-g /foo/bar/.gradle"
+              - "-PmavenUserName=foobar"
             tasks: |
                    init
                    build
@@ -458,7 +462,6 @@ def gradle(parser, xml_parent, data):
     """
     gradle = XML.SubElement(xml_parent, 'hudson.plugins.gradle.Gradle')
     XML.SubElement(gradle, 'description').text = ''
-    XML.SubElement(gradle, 'switches').text = ''
     XML.SubElement(gradle, 'tasks').text = data['tasks']
     XML.SubElement(gradle, 'rootBuildScriptDir').text = ''
     XML.SubElement(gradle, 'buildFile').text = ''
@@ -466,6 +469,8 @@ def gradle(parser, xml_parent, data):
         'wrapper', False)).lower()
     XML.SubElement(gradle, 'makeExecutable').text = str(data.get(
         'executable', False)).lower()
+    switch_string = '\n'.join(data.get('switches', []))
+    XML.SubElement(gradle, 'switches').text = switch_string
 
 
 def batch(parser, xml_parent, data):