Because the current restore has defined RestoreConfig, windows linker complains.
This commit rename the RestoreConfig used in FastRestore as RestoreConfigFR.
1) Should recruit only configured number of roles;
2) Should never register a restore master interface as a restore worker (loader or applier) interface.
1) Do not keep restore role data (e.g., masterData) in restore worker;
2) Change function parameter list by only passing in the needed variables in role data;
3) Remove unneccessary files vector from masterData;
4) Change typos in comments and some functions name.
Meng Xu