Allow only one job at a time

This should also work around the problem with the about page reporting
the wrong engine version sometimes after an
upgrade (daisy/pipeline-assembly#97) because
system.properties is now always overwritten.

roles/test-server/files/opt/daisy-pipeline2/etc/system.properties

@@ -0,0 +1,37 @@
+#fwk version
+org.daisy.pipeline.version=1.9.11-SNAPSHOT
+#misc conf
+derby.stream.error.file=/var/log/daisy-pipeline2/derby.log
+logback.configurationFile=file:/etc/opt/daisy-pipeline2/config-logback.xml
+org.daisy.pipeline.iobase=${org.daisy.pipeline.data}/jobs
+org.daisy.pipeline.logdir=/var/log/daisy-pipeline2
+#number of parallel workers
+org.daisy.pipeline.procs=1
+org.daisy.pipeline.xproc.configuration=${org.daisy.pipeline.home}/etc/config-calabash.xml
+# org.ops4j.pax.logging.DefaultServiceLog.level=WARN
+# org.ops4j.pax.logging.service.frameworkEventsLogLevel=TRACE
+
+# To load AWT in headless mode when running the Braille modules
+java.awt.headless=true
+
+#WS configuration
+org.daisy.pipeline.ws.host=localhost
+#allow local filesystem interaction
+#org.daisy.pipeline.ws.localfs=true
+#org.daisy.pipeline.ws.authentication=false
+#org.daisy.pipeline.ws.authentication.key=clientid
+#org.daisy.pipeline.ws.authentication.secret=supersecret
+
+#SSL
+#org.daisy.pipeline.ws.ssl=true
+#org.daisy.pipeline.ws.ssl.keystore=${org.daisy.pipeline.home}/etc/keystore
+#org.daisy.pipeline.ws.ssl.keystorepassword=password
+#org.daisy.pipeline.ws.ssl.keypassword=password
+
+#persistence properties
+#org.daisy.pipeline.persistence.url=jdbc:mysql://localhost:3306/daisy_pipeline
+#org.daisy.pipeline.persistence.user=root
+#org.daisy.pipeline.persistence.password=pass
+
+#calabash properties
+com.xmlcalabash.config.user=""

roles/test-server/tasks/main.yml

@@ -30,6 +30,9 @@
     path: /var/opt/daisy-pipeline2
     state: absent
 - shell: DEBIAN_FRONTEND=noninteractive dpkg -i /tmp/debs/*.deb
+- copy:
+    src: opt/daisy-pipeline2/etc/system.properties
+    dest: /opt/daisy-pipeline2/etc/
 - service:
     name: "{{ item }}"
     state: started