Fix JSONRPC version string
Fix JSONRPC version string

The version string returned via JSONRPC was missing the client name since cfbe8c

RomanZacharia/pyethapp,gsalgado/pyethapp,changwu-tw/pyethapp,ethereum/pyethapp,ethereum/pyethapp,RomanZacharia/pyethapp,changwu-tw/pyethapp,gsalgado/pyethapp