Description of problem:
If you try to build an image from command line using imagefactory and xml template with wild char '&' in raw type will cause xml parse error. 

Version-Release number of selected component (if applicable):
imagefactory-0.8.9-1.fc15.noarch
oz-0.7.9-3.fc15.noarch

How reproducible:
Always

Steps to Reproduce:
1. Create template with wild char '&' in raw type (or see attached example)
2. run #sudo imagefactory --debug --target rhevm --template /path/to/template.tdl

  
Actual results:
2011-11-30 13:47:16,814 DEBUG imgfac.ImageWarehouse.ImageWarehouse pid(17106) Message: Created Image Warehouse instance http://localhost:9090 - buckets(target_images, templates, icicles, provider_images)
2011-11-30 13:47:16,815 DEBUG imgfac.ImageWarehouse.ImageWarehouse pid(17106) Message: Created Image Warehouse instance http://localhost:9090 - buckets(target_images, templates, icicles, provider_images)
Entity: line 18: parser error : xmlParseEntityRef: no name
      Aeolus Cloud Test page on Build Created for Mumbai & Westford  Private RHE
                                                          ^
Traceback (most recent call last):
  File "/usr/bin/imagefactory", line 224, in <module>
    sys.exit(Application().main())
  File "/usr/bin/imagefactory", line 203, in main
    dispatchers = BuildDispatcher().build_image_for_targets(self.app_config['image'], None, self.app_config['template'], self.app_config['target'])
  File "/usr/lib/python2.7/site-packages/imgfac/BuildDispatcher.py", line 54, in build_image_for_targets
    image_id = self._ensure_image_with_template(image_id, template)
  File "/usr/lib/python2.7/site-packages/imgfac/BuildDispatcher.py", line 133, in _ensure_image_with_template
    name = self._xml_node(template.xml, '/template/name')
  File "/usr/lib/python2.7/site-packages/imgfac/BuildDispatcher.py", line 126, in _xml_node
    nodes = libxml2.parseDoc(xml).xpathEval(xpath)
  File "/usr/lib64/python2.7/site-packages/libxml2.py", line 1263, in parseDoc
    if ret is None:raise parserError('xmlParseDoc() failed')
libxml2.parserError: xmlParseDoc() failed


Expected results:
No xml parse error