[Process] Process Execution Refactor (#2632)

* Swap execute output method

* Create "Process" class and move random string to Strings

* test

* Tweaks

common/database/database_dump_service.h

@@ -73,7 +73,6 @@ private:
 	std::string dump_path;
 	std::string dump_file_name;
 
-	std::string execute(const std::string &cmd, bool return_result);
 	bool IsMySQLInstalled();
 	std::string GetMySQLVersion();
 	std::string GetBaseMySQLDumpCommand();