N1QL QueryOptions raw option support

The N1QL QueryOptions has an option to pass in options as key, value pairs via the raw option. However, the raw option does not propagate to the bindings and thus doesn't propagate to libcouchbase (which executes the query).

Fix:

• Update how the raw option is handled when building out the query
• parse the options provided in the raw option (the raw option is a key,value map)
• pass the options provided in the raw option as encoded JSON along with other query options to libcouchbase