btl/openib : correctly handle eager rdma buffers in mca_btl_openib_del_procs

if eager rdma is used, endpoint reference_count is greater than one.
this commit is a temporary fix that OBJ_RELEASE the endpoint as much as needed.
thought this is likely correct, it can be suboptimal and hence needs to be reviewed

cmr=v1.8.2:reviewer=hjelmn
Fetch info from both opal_dstore_nonpeer and opal_dstore_peer

This conservative fixes tries to fetch info from both
opal_dstore_nonpeer and opal_dstore_peer.
This is required is task A spawns tasks B and C.
B was previously unable to find info from C, this caused locality
info not being set and a hang in coll/ml init.

no CMR is required since v1.8 uses a unique dstore