Add the configuration of the Jenkins URL in the container

Some operations in pipeline jobs depend on the Jenkins URL to be set in
the configuration, which wasn't done automatically yet.

This change adds the respective configuration file to the master container,
having the URL `gerrit-ci.gerritforge.com` configured.

Change-Id: I73c209162d15bb92fb6894d9b2962c5713d0061f
diff --git a/jenkins-docker/master/Dockerfile b/jenkins-docker/master/Dockerfile
index a394e3d..9cfa4ab 100644
--- a/jenkins-docker/master/Dockerfile
+++ b/jenkins-docker/master/Dockerfile
@@ -44,6 +44,7 @@
 COPY edit-config.xslt $JENKINS_REF
 COPY config.xml $JENKINS_REF
 COPY jenkins.plugins.logstash.LogstashInstallation.xml $JENKINS_REF
+COPY jenkins.model.JenkinsLocationConfiguration.xml $JENKINS_REF
 COPY org.jenkinsci.plugins.xvfb.Xvfb.xml $JENKINS_REF
 
 RUN mkdir -p $JENKINS_REF/.ssh && \
diff --git a/jenkins-docker/master/jenkins.model.JenkinsLocationConfiguration.xml b/jenkins-docker/master/jenkins.model.JenkinsLocationConfiguration.xml
new file mode 100644
index 0000000..f2e465f
--- /dev/null
+++ b/jenkins-docker/master/jenkins.model.JenkinsLocationConfiguration.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<jenkins.model.JenkinsLocationConfiguration>
+  <adminAddress>GerritForge CI &lt;jenkins@gerritforge.com&gt;</adminAddress>
+  <jenkinsUrl>https://gerrit-ci.gerritforge.com/</jenkinsUrl>
+</jenkins.model.JenkinsLocationConfiguration>