This patch fixes the bugs found during heapbuf sample validation.
The following are the main changes.
	- object creation attributes are assigned conditionally
		based on the create flag passed in _heapbuf_create
	- object lock has been commented out.
	- gt_traces are removed.

These fixes does not resolve the issues seen with heapbuf_destroy
in the sample.
Signed-off-by: Arun M G <arunmg@ti.com>