Initialize vma_list and vma_gc_lifo in vma_module_t

[devreal]

Partially addresses #13047

[bosilca]

The vma_list and the vma_gc_lifo are not currently used anywhere in the codebase. I think the correct patch would be

diff --git a/opal/mca/rcache/base/rcache_base_vma.h b/opal/mca/rcache/base/rcache_base_vma.h
index c87352f2d7..a175bdd30e 100644
--- a/opal/mca/rcache/base/rcache_base_vma.h
+++ b/opal/mca/rcache/base/rcache_base_vma.h
@@ -43,9 +43,6 @@ struct mca_rcache_base_registration_t;
 struct mca_rcache_base_vma_module_t {
     opal_object_t super;
     opal_interval_tree_t tree;
-    opal_list_t vma_list;
-    opal_lifo_t vma_gc_lifo;
-    size_t reg_cur_cache_size;
     opal_mutex_t vma_lock;
 };
 typedef struct mca_rcache_base_vma_module_t mca_rcache_base_vma_module_t;
diff --git a/opal/mca/rcache/base/rcache_base_vma_tree.c b/opal/mca/rcache/base/rcache_base_vma_tree.c
index 0883e1f382..5cc8c5d5a4 100644
--- a/opal/mca/rcache/base/rcache_base_vma_tree.c
+++ b/opal/mca/rcache/base/rcache_base_vma_tree.c
@@ -34,7 +34,6 @@
 int mca_rcache_base_vma_tree_init(mca_rcache_base_vma_module_t *vma_module)
 {
     OBJ_CONSTRUCT(&vma_module->tree, opal_interval_tree_t);
-    vma_module->reg_cur_cache_size = 0;
     return opal_interval_tree_init(&vma_module->tree);
 }
 

[devreal]

Superseded by #13056