XmlRpcPlugin: Fixed 'maximum recursion depth exceeded' error on `search.performSearch` with JSON-RPC. Closes #10786.


git-svn-id: http://trac-hacks.org/svn/xmlrpcplugin/trunk@13193 7322e99d-02ea-0310-aa39-e9a107903beb
XmlRpcPlugin: Follow-up to r13193, added missing `tracrpc/tests/search.py`


git-svn-id: http://trac-hacks.org/svn/xmlrpcplugin/trunk@13194 7322e99d-02ea-0310-aa39-e9a107903beb