Replace execfile() with exec(open().read())

...for compatibility with Python 3.
Signed-off-by: Michal Čihař <michal@cihar.com>

openshift/virtualenv.py

@@ -22,4 +22,4 @@ import os
 
 VIRTENV = os.environ['OPENSHIFT_PYTHON_DIR'] + '/virtenv/'
 VIRTUALENV = os.path.join(VIRTENV, 'bin/activate_this.py')
-execfile(VIRTUALENV, dict(__file__=VIRTUALENV))
+exec(open(VIRTUALENV).read(), dict(__file__=VIRTUALENV))

openshift/wsgi.py

@@ -28,8 +28,8 @@ sys.path.append(os.path.join(os.environ['OPENSHIFT_REPO_DIR'], 'openshift'))
 
 os.environ['DJANGO_SETTINGS_MODULE'] = 'weblate.settings_openshift'
 
-execfile(os.path.join(
+exec(open(os.path.join(
     os.environ['OPENSHIFT_REPO_DIR'], 'openshift', 'virtualenv.py'
-))
+)).read())
 
 application = get_wsgi_application()

openshift/wsgi_install.py

@@ -22,9 +22,9 @@
 import os
 from string import Template
 
-execfile(os.path.join(
+exec(open(os.path.join(
     os.environ['OPENSHIFT_REPO_DIR'], 'openshift', 'virtualenv.py'
-))
+)).read())
 
 
 def application(environ, start_response):