Update signrawtransaction to not throw error when wallet is locked. (cherry picked from commit cebaed9d4d8dbee573872a1fd796bebfe6345155)
Update signrawtransaction to not throw error when wallet is locked.
(cherry picked from commit cebaed9d4d8dbee573872a1fd796bebfe6345155)

FuzzyBearBTC/peercoin,bitgrowchain/bitgrow,slimcoin-project/Slimcoin,NeuCoin/neucoin,redfish64/nomiccoin,slimcoin-project/Slimcoin,slimcoin-project/Slimcoin,bitgrowchain/bitgrow,Action-Committee/Spaceballz,elcrypto/Pulse,elcrypto/Pulse,d5000/ppcoin,internaut-me/ppcoin,5mil/SuperTurboStake,elcrypto/Pulse,sproutcoin/sprouts,slimcoin-project/Slimcoin,Stakemaker/OMFGcoin,BeirdoMud/MudCoin,internaut-me/ppcoin,lentza/SuperTurboStake,jashandeep-sohi/ppcoin,coinkeeper/2015-06-22_18-45_peercoin,redfish64/nomiccoin,FuzzyBearBTC/peercoin,5mil/Bolt,BeirdoMud/MudCoin,jashandeep-sohi/ppcoin,internaut-me/ppcoin,internaut-me/ppcoin,redfish64/nomiccoin,coinkeeper/2015-06-22_18-45_peercoin,Magicking/neucoin,elcrypto/Pulse,TurboStake/TurboStake,d5000/ppcoin,stronghands/stronghands,lentza/SuperTurboStake,redfish64/nomiccoin,5mil/Bolt,5mil/Bolt,lentza/SuperTurboStake,coinkeeper/2015-06-22_18-45_peercoin,redfish64/nomiccoin,Magicking/neucoin,SproutsEx/SproutsExtreme,bitgrowchain/bitgrow,5mil/SuperTurboStake,slimcoin-project/Slimcoin,SproutsEx/SproutsExtreme,sproutcoin/sprouts,SproutsEx/SproutsExtreme,stronghands/stronghands,sproutcoin/sprouts,bitgrowchain/bitgrow,5mil/SuperTurboStake,sproutcoin/sprouts,jashandeep-sohi/ppcoin,5mil/SuperTurboStake,NeuCoin/neucoin,BeirdoMud/MudCoin,jashandeep-sohi/ppcoin,Peerapps/ppcoin,NeuCoin/neucoin,Peerapps/ppcoin,5mil/Bolt,lentza/SuperTurboStake,Stakemaker/OMFGcoin,coinkeeper/2015-06-22_18-45_peercoin,d5000/ppcoin,TurboStake/TurboStake,Stakemaker/OMFGcoin,TurboStake/TurboStake,Action-Committee/Spaceballz,Action-Committee/Spaceballz,NeuCoin/neucoin,stronghands/stronghands,Magicking/neucoin,Peerapps/ppcoin,FuzzyBearBTC/peercoin,Magicking/neucoin,SproutsEx/SproutsExtreme,Stakemaker/OMFGcoin,Peerapps/ppcoin,d5000/ppcoin,Action-Committee/Spaceballz,lentza/SuperTurboStake,stronghands/stronghands,FuzzyBearBTC/peercoin,slimcoin-project/Slimcoin,BeirdoMud/MudCoin,TurboStake/TurboStake,redfish64/nomiccoin