Prevent lack of provider JSON blocking all access
Prevent lack of provider JSON blocking all access

- If the provider JSON cannot be retrieved
  from an Indigo CMDB, then the method that
  determines wether the signer is valid (and
  by extension, wether the POST request should
  be authorized) returns false regardless of
  wether the signer has also been
  granted special access.
- As the example Indigo CMDB is no longer
  accessible, all POST requests get denied.
- This commit fixes that by making the method
  continue on to check the ALLOWED_TO_POST
  variable if the list of provders can't be
  retrieved

apel/rest,apel/rest