Image / Buffer refactor.

- do not use redescribe flag for image/buffer from other image/buffer.
- use redescribe flag only when image is redescribed via redescribe interface
- remove image specific functions from mem object
- remove redundant fields
- add new implementation of isImageFromBuffer/isImageFromImage basing
on associated mem object.
- pass associated mem object to redescrbed images.
- remove redundant setters

Change-Id: I267637a48fbc2afdad9a9f5e5e9ccd6bd0c09972

runtime/mem_obj/mem_obj.cpp

@@ -55,11 +55,11 @@ MemObj::~MemObj() {
         needWait = true;
     }
 
-    if (memoryManager) {
+    if (memoryManager && !isObjectRedescribed) {
         if (peekSharingHandler()) {
             peekSharingHandler()->releaseReusedGraphicsAllocation();
         }
-        if (graphicsAllocation && !associatedMemObject && !isObjectRedescribed && !isHostPtrSVM && graphicsAllocation->peekReuseCount() == 0) {
+        if (graphicsAllocation && !associatedMemObject && !isHostPtrSVM && graphicsAllocation->peekReuseCount() == 0) {
             memoryManager->removeAllocationFromHostPtrManager(graphicsAllocation);
             bool doAsyncDestrucions = DebugManager.flags.EnableAsyncDestroyAllocations.get();
             if (!doAsyncDestrucions) {