Added job spec for trigger-ondemand, added to the admin page

jenkins-master/config.xml

@@ -147,6 +147,7 @@
         <comparator class="hudson.util.CaseInsensitiveComparator"/>
         <string>get_mozmill-environments</string>
         <string>tools</string>
+	<string>trigger-ondemand</string>
       </jobNames>
       <jobFilters/>
       <columns>

jenkins-master/jobs/trigger-ondemand/config.xml

@@ -0,0 +1,31 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<project>
+  <actions/>
+  <description>Trigger an on-demand test run</description>
+  <keepDependencies>false</keepDependencies>
+  <properties>
+    <hudson.model.ParametersDefinitionProperty>
+      <parameterDefinitions>
+        <hudson.model.FileParameterDefinition>
+          <name>config.ini</name>
+          <description>Configuration File</description>
+        </hudson.model.FileParameterDefinition>
+      </parameterDefinitions>
+    </hudson.model.ParametersDefinitionProperty>
+  </properties>
+  <scm class="hudson.scm.NullSCM"/>
+  <assignedNode>master</assignedNode>
+  <canRoam>false</canRoam>
+  <disabled>false</disabled>
+  <blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>
+  <blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>
+  <triggers class="vector"/>
+  <concurrentBuild>false</concurrentBuild>
+  <builders>
+    <hudson.tasks.Shell>
+      <command>${JENKINS_HOME}/../jenkins-env/bin/python ${JENKINS_HOME}/../trigger_on_demand_testrun.py config.ini</command>
+    </hudson.tasks.Shell>
+  </builders>
+  <publishers/>
+  <buildWrappers/>
+</project>