Moving fsync pmdk functionalty from persist to drain on the advice of the PMDK developers

src/aiori-PMDK.c

@@ -106,6 +106,7 @@ static void *PMDK_Create(char * testFileName, IOR_param_t * param){
     }
 
 
+    
     return((void *)pmemaddr);
 } /* PMDK_Create() */
 
@@ -184,9 +185,7 @@ static IOR_offset_t PMDK_Xfer(int access, void *file, IOR_size_t * buffer,
 
 static void PMDK_Fsync(void *fd, IOR_param_t * param)
 {
-  size_t open_length;
-  open_length = param->transferSize;
-  pmem_persist(&fd, open_length);
+  pmem_drain();
 } /* PMDK_Fsync() */