SMB Test is failing on Travis CI

[ysb33r]

org.ysb33r.groovy.vfsplugin.smb.SmbPluginSpec > Can we list files FAILED
    org.apache.commons.vfs2.FileSystemException: Could not determine the type of file "foo://GROOVYVFS\jlan:***@127.0.0.1:1445/READROOT/test-files".
        at org.apache.commons.vfs2.provider.AbstractFileObject.attach(AbstractFileObject.java:1522)
        at org.apache.commons.vfs2.provider.AbstractFileObject.getChildren(AbstractFileObject.java:642)
        at org.ysb33r.groovy.dsl.vfs.VFS.ls(VFS.groovy:301)
        at org.ysb33r.groovy.vfsplugin.smb.SmbPluginSpec.Can we list files_closure2(SmbPluginSpec.groovy:91)
        at org.ysb33r.groovy.vfsplugin.smb.SmbPluginSpec.Can we list files_closure2(SmbPluginSpec.groovy)
        at org.ysb33r.groovy.dsl.vfs.VFS.script(VFS.groovy:218)
        at org.ysb33r.groovy.vfsplugin.smb.SmbPluginSpec.Can we list files(SmbPluginSpec.groovy:90)

        Caused by:
        jcifs.smb.SmbException: A device attached to the system is not functioning.
            at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:563)
            at jcifs.smb.SmbTransport.send(SmbTransport.java:663)
            at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:390)
            at jcifs.smb.SmbSession.send(SmbSession.java:218)
            at jcifs.smb.SmbTree.treeConnect(SmbTree.java:176)
            at jcifs.smb.SmbFile.doConnect(SmbFile.java:911)
            at jcifs.smb.SmbFile.connect(SmbFile.java:954)
            at jcifs.smb.SmbFile.connect0(SmbFile.java:880)
            at jcifs.smb.SmbFile.queryPath(SmbFile.java:1335)
            at jcifs.smb.SmbFile.exists(SmbFile.java:1417)
            at jcifs.smb.SmbFile.isDirectory(SmbFile.java:1490)
            at org.ysb33r.groovy.vfsplugin.smb.SmbFileObject.createSmbFile(SmbFileObject.groovy:136)
            at org.ysb33r.groovy.vfsplugin.smb.SmbFileObject.doAttach(SmbFileObject.groovy:88)
            at org.apache.commons.vfs2.provider.AbstractFileObject.attach(AbstractFileObject.java:1505)
            ... 6 more