Enforce reading of nuxeo.conf

java.lang.StringIndexOutOfBoundsException: String index out of range: -2  at java.lang.String.substring(String.java:1937) 
	at org.nuxeo.launcher.config.ConfigurationGenerator.loadConfiguration(ConfigurationGenerator.java:863)  
	at org.nuxeo.launcher.config.ConfigurationGenerator.saveConfiguration(ConfigurationGenerator.java:691)  
	at org.nuxeo.launcher.config.ConfigurationGenerator.saveConfiguration(ConfigurationGenerator.java:670)  
	at org.nuxeo.launcher.config.ConfigurationGenerator.saveFilteredConfiguration(ConfigurationGenerator.java:716)  
	at org.nuxeo.launcher.config.ConfigurationGenerator.addTemplate(ConfigurationGenerator.java:1233)  
	at org.nuxeo.connect.update.impl.task.commands.Config.doRun(Config.java:78)  
	at org.nuxeo.connect.update.impl.task.commands.AbstractCommand.run(AbstractCommand.java:112) 
	at org.nuxeo.connect.update.impl.task.CommandsTask.doRun(CommandsTask.java:119)  
	at org.nuxeo.connect.update.impl.task.InstallTask.doRun(InstallTask.java:51)  
	at org.nuxeo.connect.update.impl.task.AbstractTask.run(AbstractTask.java:255) 
	at org.nuxeo.ecm.admin.offline.update.LocalPackageManager.performTask(LocalPackageManager.java:433) 
	at org.nuxeo.ecm.admin.offline.update.LocalPackageManager.install(LocalPackageManager.java:476)  
	at org.nuxeo.ecm.admin.offline.update.LocalPackageManager.run(LocalPackageManager.java:281)  
	at org.nuxeo.ecm.admin.offline.update.LocalPackageManager.main(LocalPackageManager.java:228)