Fix tests for array of sysadmin name
Fix tests for array of sysadmin name

With PR#57 SQLSYSADMINACCOUNTS properly handles multiple admin but
tests were not updated accordingly.

chef-cookbooks/sql_server,criteo-forks/sql_server,mahsoud/sql_server,tpetchel/sql_server,criteo-forks/sql_server,opscode-cookbooks/sql_server,jakimowicz/sql_server,jakimowicz/sql_server,mahsoud/sql_server,chef-cookbooks/sql_server,tpetchel/sql_server,opscode-cookbooks/sql_server