Decouple OAuthRequestException from OAuthResponseParams

Decouple OAuthRequestException from OAuthResponseParams

1) Add a formatted description string to the OAuthError enum. This adds meaningful structure to standard oauth error messages. This also allows the descriptions to be reused.

2) Allow for OAuthRequestException exceptions to be thrown outside OAuthResponseParam.


In the future, we could change OAuthError to extend caja's MessageTypeInt. This would allow us to reuse their SimpleMessageQueue to collect the context of different errors, and generate a clean requestTrace.

[Paul Lindner, 2010-05-25 09:30:04]

lgtm --  I do like the error messages inside the enum