COOK-4735 sql_server cookbook SysPrep support for PrepareImage and CompleteImage

Add setup_action, role and feature_list attribute with conditional
default
Don't create TCP Reg key if SQL is not being installed or CompleteImaged
Don't render service user sections of template if setup_action is PrepareImage
Don't render feature or role sections of template if setup_action is CompleteImage
Merge pull request #1 from john-coleman-w/TD-2304_Ensure_sql_server_cookbook_supports_2008R2_sysprep

COOK-4735 sql_server cookbook SysPrep support for PrepareImage and Compl...