This prevents NumberFormatException in RestApiServlet on queries like:
GET /gerrit/changes/?n=25&O=815%20oR%209%3D9%20%2B%201
Which results with
ERROR| RestApiServlet | Error in GET
/gerrit/changes/?n=25&O=815%20oR%209%3D9%20%2B%201
java.lang.NumberFormatException: For input string: "815 oR 9=9 + 1"
plus the stack trace without this patch.
Change-Id: I631c51e768095998f87d861fd09d0394f23c81c1
Signed-off-by: Eryk Szymanski <eryksz@gmail.com>