cups-browsed,implicitclass: Do fallback without mediacol

[deepak0405]

The fallback is required in three cases :

1. Some printers doesn't support "media-col-database", so in that case we can do a IPP2.0 request without asking for media-col-database. In this case the ipp status returned is IPP_STATUS_ERROR_BAD_REQUEST.

2. Some printer doesn't support IPP2.0 and return error IPP_STATUS_ERROR_VERSION_NOT_SUPPORTED, so in this case we do a IPP1.1 request.

3. In some case, the ipp status is null, but still no information is returned from the printer, the printer only returns attributes-natural-language and attribute charset, in this case, we can do one of the above fallback to get better output.

Implementation
First we do a normal IPP 2.0 request with requested attributes {"all", "media-col-database"}, if it fails we do a IPP1.1 request, and if that also fails we do a request without asking for media-col-database.

Testing

1. Tested on a remote cups Queue where the cups version on the printer side was 2.2.10
2. Tested for legacy printer, where the cups version was 1.4.2
3. Tested for a IPP network printer supporting only IPP 1.1
4. Tested for a IPP network printer supporting IPP 2.0.