Latest build is failing on Travis

[sarxos]

Tests run: 9, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 0.544 sec <<< FAILURE!
test_getImage(com.github.sarxos.webcam.WebcamTest)  Time elapsed: 0.017 sec  <<< ERROR!
com.github.sarxos.webcam.WebcamException: Webcam DummyDevice-1 has been locked and cannot be open
    at com.github.sarxos.webcam.WebcamLock.lock(WebcamLock.java:97)
    at com.github.sarxos.webcam.Webcam.open(Webcam.java:180)
    at com.github.sarxos.webcam.Webcam.open(Webcam.java:146)
    at com.github.sarxos.webcam.WebcamTest.test_getImage(WebcamTest.java:104)

test_close(com.github.sarxos.webcam.WebcamTest)  Time elapsed: 0.007 sec  <<< ERROR!
com.github.sarxos.webcam.WebcamException: Webcam DummyDevice-1 has been locked and cannot be open
    at com.github.sarxos.webcam.WebcamLock.lock(WebcamLock.java:97)
    at com.github.sarxos.webcam.Webcam.open(Webcam.java:180)
    at com.github.sarxos.webcam.Webcam.open(Webcam.java:146)
    at com.github.sarxos.webcam.WebcamTest.test_close(WebcamTest.java:85)

Tests in error: 
  WebcamTest.test_getImage:104 » Webcam Webcam DummyDevice-1 has been locked and...
  WebcamTest.test_close:85 » Webcam Webcam DummyDevice-1 has been locked and can...

Reactor:

[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Webcam Capture Parent POM ......................... SUCCESS [0.491s]
[INFO] Webcam Capture .................................... FAILURE [5.275s]
[INFO] Webcam Capture Addons ............................. SKIPPED
[INFO] Webcam Capture - SWT Addon ........................ SKIPPED
[INFO] Webcam Capture Drivers ............................ SKIPPED
[INFO] Webcam Capture - FFmpeg CLI Driver ................ SKIPPED
[INFO] Webcam Capture - GStreamer Driver ................. SKIPPED
[INFO] Webcam Capture - IP Camera Driver ................. SKIPPED
[INFO] Webcam Capture - JavaCV Driver .................... SKIPPED
[INFO] Webcam Capture - JMF Driver ....................... SKIPPED
[INFO] Webcam Capture - LTI-CIVIL Driver ................. SKIPPED
[INFO] Webcam Capture - OpenIMAJ Driver .................. SKIPPED
[INFO] Webcam Capture - V4L4J Driver ..................... SKIPPED
[INFO] Webcam Capture - VLCj Driver ...................... SKIPPED
[INFO] Webcam Capture Examples ........................... SKIPPED
[INFO] Webcam Capture - Applet Example ................... SKIPPED
[INFO] Webcam Capture - Executable Example ............... SKIPPED
[INFO] Webcam Capture - Live Vide Streaming Example ...... SKIPPED
[INFO] Webcam Capture - Custom Painter Example ........... SKIPPED
[INFO] Webcam Capture - Motion Detector Example .......... SKIPPED
[INFO] Webcam Capture - Custom Painter Example ........... SKIPPED
[INFO] Webcam Capture - QR Code Example .................. SKIPPED
[INFO] Webcam Capture - WebcamPanel SWT-AWT .............. SKIPPED
[INFO] Webcam Capture - Video Recording Example .......... SKIPPED
[INFO] Webcam Capture Pages .............................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.987s
[INFO] Finished at: Thu May 30 12:38:15 UTC 2013
[INFO] Final Memory: 17M/135M
[INFO] ------------------------------------------------------------------------