OSHMEM: sshmem verbs: allocate memory at fixed address

Use experimental verbs to allocate memory at fixed base
virtual address.

verbs will disqualify itself if shared_mr is disabled
or not supported and it is impossible to allocate memory
starting at fixed base virtual address.

verbs contig pages allocator did not guarantee fixed va, now it does.
(cherry picked from commit fd77ebd4525e9e0c1a3ab1c4966bf31aa45251b4)

Apply Jeff`s comments

Update with Jeff commits
Fix iallgather problem with intercommunicators

A problem was found with the libnbc MPI_Iallgather
routine when using intercommunicators.  Special
thanks to Takahiro Kawashima(Fujitsu) for the patch
and a test case.  Verified master fails without the
patch and the test passes with the patch applied.

fixes #219
oshmem mmap: new mca parameters were introduced - sshmem_mmap_anonymous, sshmem_mmap_fixed and sshmem_base_backing_file_dir - for runtime mmap management.

(ompi commits: ce4ee2aa8d960eb72292f5bb64108e5a85796e1d, 3e7002e8aad2a2fe0835c67b9714dceef3c4b31b, b2a93943dc5cc7602cb8ed83e65524452beb82c7)
Merge pull request #18 from hppritcha/topic/fix-219-v1.8

Fix iallgather problem with intercommunicators
Revised patch that now includes ONLY the desired change from:

open-mpi/ompi@2ec59ac
Correct the configure name - we still use OMPI_WANT_MEMCHECKER in v1.8
Merge pull request #51 from rhc54/cmr/memchecker

Silence memchecker warnings
man: remove stale Java bindings from MPI man pages

Fixes #244

(cherry picked from commit ec7808cd27fa30cca2b7a189dc2c8363772fbc90)
man: add $COPYRIGHT$ token and emacs mode to all man pages
help-opal-shmem-mmap.txt: trivial typo fix

(cherry picked from commit 5207429734d131f80397c7bdab12f52de05881a2)
Add missing Fortran binding for Win_allocate.

(cherry picked from commit 9020a1c1f6b1a716e6aafdac5a8f00ede3abf489)
shmem/mmap: do not use O_CREAT in shared memory attach

master commit
open-mpi/ompi@56a8687c2a06b503a00dc92c41bd20bf761e040d
osc/rdma: fix issue identified by Berk Hess

osc/rdma uses counters to determine if all messages have been received
before exiting synchronization calls. The problem is that the active
target counter is always increasing (never zeroed). If over 2^31-1
messages are sent this causes the counter to overflow (in itself this
isn't an error). This causes test/wait to return before the communication
is complete. There is an additional error in the use of the fragment
flush function. If PSCW synchronization is in use this function CAN NOT
be called unless a post message has arrived.

Relevant mailing list thread: http://www.open-mpi.org/community/lists/devel/2014/10/16016.php

This commit fixes both issues. Tested against MTT and issue reproducer.

(cherry picked from commit open-mpi/ompi@eed7b45db59b356f6257f3b019e77643f14f84ce)
osc/rdma: use unsigned types for all counters

Some of the counters used by the "rdma" one-sided component are intended
to overflow. Since overflow behavior is undefined for signed integers in
C it is safer to use unsigned integers here.

(cherry picked from commit open-mpi/ompi@23dd3af946dbfec55f3261c2a1a8e3ea30ed695c)
Merge pull request #55 from jsquyres/pr/1.8-fortran-win-allocate-bindings

Add missing Fortran binding for Win_allocate.
Merge pull request #54 from jsquyres/pr/1.8-trivial-help-msg-typo-fix

help-opal-shmem-mmap.txt: trivial typo fix
Merge pull request #47 from hjelmn/v1.8_rdma_fixes

osc/rdma: bring over one-sided fixes from master
Merge pull request #9 from miked-mellanox/topic/fix-verbs-allocator-to-use-fixed-va

fix verbs allocator to use fixed VA for memheap
Merge pull request #56 from hjelmn/shmem_mmap_fix

shmem/mmap: do not use O_CREAT in shared memory attach
Merge pull request #52 from jsquyres/pr/1.8-man-page-java-fixes

Man page fixes