fixing models to resolve XML violation issue

data/haarcascades/haarcascade_frontalcatface.xml

 <?xml version="1.0"?>
-<!----------------------------------------------------------------------------
+<!--
  A frontal cat face detector using the basic set of Haar features, i.e.
  horizontal and vertical features but not diagonal features.
 
@@ -73,7 +73,7 @@
  | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  Back to
  | Top
  //////////////////////////////////////////////////////////////////////////
- ---------------------------------------------------------------------------->
+ -->
 <opencv_storage>
 <cascade>
   <stageType>BOOST</stageType>

data/haarcascades/haarcascade_frontalcatface_extended.xml

 <?xml version="1.0"?>
-<!----------------------------------------------------------------------------
+<!--
  A frontal cat face detector using the full set of Haar features, i.e.
  horizontal, vertical, and diagonal features.
 
@@ -73,7 +73,7 @@
  | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  Back to
  | Top
  //////////////////////////////////////////////////////////////////////////
- ---------------------------------------------------------------------------->
+ -->
 <opencv_storage>
 <cascade>
   <stageType>BOOST</stageType>

data/haarcascades/haarcascade_smile.xml

 <?xml version="1.0"?>
-<!----------------------------------------------------------------------------
+<!--
   Smile detector
   Contributed by Oscar Deniz Suarez
   More information can be found at http://visilab.etsii.uclm.es/personas/oscar/oscar.html
@@ -43,7 +43,7 @@
 | Top
 //////////////////////////////////////////////////////////////////////////
 
------------------------------------------------------------------------->
+-->
 <opencv_storage>
 <cascade type_id="opencv-cascade-classifier"><stageType>BOOST</stageType>
   <featureType>HAAR</featureType>

data/haarcascades_cuda/haarcascade_smile.xml

 <?xml version="1.0"?>
-<!----------------------------------------------------------------------------
+<!--
   Smile detector
   Contributed by Oscar Deniz Suarez
   More information can be found at http://visilab.etsii.uclm.es/personas/oscar/oscar.html
@@ -43,7 +43,7 @@
 | Top
 //////////////////////////////////////////////////////////////////////////
 
------------------------------------------------------------------------->
+-->
 <opencv_storage>
 <!-- Automatically converted from data/classifier, window size = 36x18 -->
 <SmileDetector type_id="opencv-haar-classifier">

data/lbpcascades/lbpcascade_frontalcatface.xml

 <?xml version="1.0"?>
-<!----------------------------------------------------------------------------
+<!--
  A frontal cat face detector using LBP features.
 
  Contributed by Joseph Howse (josephhowse@nummist.com).
@@ -72,7 +72,7 @@
  | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  Back to
  | Top
  //////////////////////////////////////////////////////////////////////////
- ---------------------------------------------------------------------------->
+-->
 <opencv_storage>
 <cascade>
   <stageType>BOOST</stageType>