Change request execution path

Change request execution path

Add RequestTaker - interface for objects executing requests.
Derive Logic from RequestTaker.
Implement CheckRequest execution in Logic.
Swap const references to Request derivatives with shared pointers.
Add pointers.h file to gather all request related shared pointers.
Remove Request.cpp file (all methods inlined).
Fix SocketManager request execution.
Remove not any more needed NoResponseGeneratedException class.
Add temporary impl. of method requestTaker() to SocketManager.

Change-Id: I67526fb1f68cc90c5340572445ce63068bed03ea