Update opal_free_list_t usage to reflect new class interface.

Please verify your components have been updated correctly. Keep in
mind that in terms of threading:

OPAL_FREE_LIST_GET -> opal_free_list_get_st
OPAL_FREE_LIST_RETURN -> opal_free_list_return_st

I used the opal_using_threads() variant anytime it appeared multiple
threads could be operating on the free list. If this is not the case
update to _st. If multiple threads are always in use change to _mt.

ompi/mpi/java/c/mpi_MPI.c

@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
 /*
  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
  *                         University Research and Technology
@@ -9,6 +10,8 @@
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
+ * Copyright (c) 2015      Los Alamos National Security, LLC.  All rights
+ *                         reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -149,7 +152,8 @@ static void initFreeList(void)
     OBJ_CONSTRUCT(&ompi_java_buffers, opal_free_list_t);
 
     int r = opal_free_list_init(&ompi_java_buffers, sizeof(ompi_java_buffer_t),
-                                OBJ_CLASS(ompi_java_buffer_t), 2, -1, 2);
+                                OBJ_CLASS(ompi_java_buffer_t), 0, 0, 2, -1, 2,
+                                NULL, 0, NULL, NULL, NULL);
     if(r != OPAL_SUCCESS)
     {
         fprintf(stderr, "Unable to initialize ompi_java_buffers.\n");
@@ -511,12 +515,11 @@ static void* getBuffer(JNIEnv *env, ompi_java_buffer_t **item, int size)
     }
     else
     {
-        int rc;
         opal_free_list_item_t *freeListItem;
-        OPAL_FREE_LIST_GET(&ompi_java_buffers, freeListItem, rc);
+        freeListItem = opal_free_list_get (&ompi_java_buffers);
 
-        ompi_java_exceptionCheck(env,
-                rc==OPAL_SUCCESS ? OMPI_SUCCESS : OMPI_ERROR);
+        ompi_java_exceptionCheck(env, NULL == freeListItem ? OMPI_ERROR :
+                                 OMPI_SUCCESS);
 
         *item = (ompi_java_buffer_t*)freeListItem;
         return (*item)->buffer;
@@ -532,7 +535,7 @@ static void releaseBuffer(void *ptr, ompi_java_buffer_t *item)
     else
     {
         assert(item->buffer == ptr);
-        OPAL_FREE_LIST_RETURN(&ompi_java_buffers, (opal_free_list_item_t*)item);
+        opal_free_list_return (&ompi_java_buffers, (opal_free_list_item_t*)item);
     }
 }