Add superuser config section for updating license

util/config/provider/baseprovider.py

@@ -102,22 +102,22 @@ class BaseProvider(object):
 
   def _get_license_file(self):
     """ Returns the contents of the license file. """
+    if not self.has_license_file():
+     msg = 'Could not find license file. Please make sure it is in your config volume.'
+     raise LicenseError(msg)
+
     try:
       return self.get_volume_file(LICENSE_FILENAME)
     except IOError:
       msg = 'Could not open license file. Please make sure it is in your config volume.'
       raise LicenseError(msg)
 
-  def validate_license(self, config):
-    """ Validates that the configuration matches the license file (if any). """
-    if not config.get('SETUP_COMPLETE', False):
-      raise SetupIncompleteException()
-
+  def get_license(self):
+    """ Returns the decoded license, if any. """
     with self._get_license_file() as f:
       license_file_contents = f.read()
 
-    self.license = decode_license(license_file_contents)
-    self.license.validate(config)
+    return decode_license(license_file_contents)
 
   def save_license(self, license_file_contents):
     """ Saves the given contents as the license file. """

util/config/provider/testprovider.py

@@ -1,5 +1,5 @@
 import json
-from StringIO import StringIO
+import io
 
 from util.config.provider.baseprovider import BaseProvider
 
@@ -53,7 +53,7 @@ class TestConfigProvider(BaseProvider):
     if filename in REAL_FILES:
       return open(filename, mode=mode)
 
-    return StringIO(self.files[filename])
+    return io.BytesIO(self.files[filename])
 
   def requires_restart(self, app_config):
     return False