[Process] Process Execution Refactor (#2632)

* Swap execute output method

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

* test

* Tweaks

common/strings.h

@@ -112,6 +112,7 @@ public:
 	static uint32 TimeToSeconds(std::string time_string);
 	static bool ToBool(std::string bool_string);
 	static inline bool EqualFold(const std::string &string_one, const std::string &string_two) { return strcasecmp(string_one.c_str(), string_two.c_str()) == 0; }
+	static std::string Random(size_t length);
 
 	template<typename T>
 	static std::string