[Process] Process Execution Refactor (#2632)

* Swap execute output method

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

* test

* Tweaks

common/strings.cpp

@@ -738,3 +738,18 @@ bool Strings::ToBool(std::string bool_string)
 
 	return false;
 }
+
+// returns a random string of specified length
+std::string Strings::Random(size_t length)
+{
+	auto        randchar = []() -> char {
+		const char   charset[] = "0123456789"
+								 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+								 "abcdefghijklmnopqrstuvwxyz";
+		const size_t max_index = (sizeof(charset) - 1);
+		return charset[static_cast<size_t>(std::rand()) % max_index];
+	};
+	std::string str(length, 0);
+	std::generate_n(str.begin(), length, randchar);
+	return str;
+}