Typos in javadoc for Solr QueryResponseWriter.write

[Jack Krupansky]

A couple of typos in the javadoc for Solr QueryResponseWriter.write:

1. “this method must be thread save” – “save” s.b. “safe”.
2. “<code>req</code>” – “req” s.b. “request”.
3. “<code>rsp</code>” – “rsp” s.b. “response”.

-- Jack Krupansky