Allow running only on one of nodes with label parameter

Current default value setting makes the jobs with label parameter
execute in parallel on all nodes matching a label. In some cases that is
not expected and is undesirable. It is also no the default value
upstream

Change-Id: Idf3460f165209611113193c7e85a884c42511371

jenkins_jobs/modules/parameters.py

@@ -190,6 +190,8 @@ def label_param(registry, xml_parent, data):
     :arg str name: the name of the parameter
     :arg str default: the default value of the parameter (optional)
     :arg str description: a description of the parameter (optional)
+    :arg bool all-nodes: to run job on all nodes matching label
+        in parallel (default: true)
     :arg str matching-label: to run all nodes matching label
         'success', 'unstable' or 'allCases' (optional)
     :arg str node-eligibility: all nodes, ignore temporary nodes or
@@ -206,10 +208,9 @@ def label_param(registry, xml_parent, data):
                'org.jvnet.jenkins.plugins.nodelabelparameter.'
                'LabelParameterDefinition')
 
-    XML.SubElement(pdef, 'allNodesMatchingLabel').text = "true"
-
     valid_types = ['allCases', 'success', 'unstable']
     mapping = [
+        ('all-nodes', 'allNodesMatchingLabel', True),
         ('matching-label', 'triggerIfResult', 'allCases', valid_types),
     ]
     helpers.convert_mapping_to_xml(pdef, data, mapping, fail_required=True)

tests/parameters/fixtures/node-label005.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <properties>
+    <hudson.model.ParametersDefinitionProperty>
+      <parameterDefinitions>
+        <org.jvnet.jenkins.plugins.nodelabelparameter.LabelParameterDefinition>
+          <name>EXAMPLE LABEL 4</name>
+          <description>EXAMPLE LABEL DESCRIPTION 4</description>
+          <defaultValue/>
+          <allNodesMatchingLabel>false</allNodesMatchingLabel>
+          <triggerIfResult>allCases</triggerIfResult>
+          <nodeEligibility class="org.jvnet.jenkins.plugins.nodelabelparameter.node.AllNodeEligibility"/>
+        </org.jvnet.jenkins.plugins.nodelabelparameter.LabelParameterDefinition>
+      </parameterDefinitions>
+    </hudson.model.ParametersDefinitionProperty>
+  </properties>
+</project>

tests/parameters/fixtures/node-label005.yaml

@@ -0,0 +1,5 @@
+parameters:
+  - label:
+      name: EXAMPLE LABEL 4
+      description: "EXAMPLE LABEL DESCRIPTION 4"
+      all-nodes: false