Always default skip-federated to false with galera
Fixed problem with wsrep_sst_auth

wsrep_sst_auth value was not being set correctly
due to out-of-order issue. The secure_password
call in the galera recipe happens during converge,
whereas the attribute/default.rb creation happens
on compile stage, therefore the string produced
the password as a Chef Node Attribute instead of
string value.
Merge pull request #4 from jaypipes/galera

Fixed problem with wsrep_sst_auth