Add fee to name_multisig test.
Add fee to name_multisig test.

Without a fee, the name_update is now rejected.

JeremyRand/namecore,JeremyRand/namecore,JeremyRand/namecoin-core,JeremyRand/namecoin-core,JeremyRand/namecore,JeremyRand/namecoin-core,JeremyRand/namecore,JeremyRand/namecoin-core,JeremyRand/namecore,JeremyRand/namecoin-core