IVGCVSW-3691 Rework the CounterDirectory class to take into consideration

IVGCVSW-3691 Rework the CounterDirectory class to take into consideration
the connections between components

 * Added constructors and connections to the profiling classes
 * Used hash table to keep track of the profiling objects by UID
 * Added register methods
 * Added find/check helper methods
 * Updated the makefile to include the profiling directory
 * Added unit tests for the CounterDirectory class
 * Added ICounterDirectory interface class for read-only use
 * Added custom macro to locally disable conversion warnings

Change-Id: I3f53a68663ee77b8d03ac0ef7dc01e90c6893511
Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>