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

(cherry picked up from Mellanox-v1.8 repo commit 4c391a)
oshmem mmap: copyrights for memheap_base_alloc.c files updated
Merge remote-tracking branch 'upstream/master'
oshmem mmap: set lvl4 for sshmem_mmap_anonymous and sshmem_mmap_fixed variables, define MAP_ANONYMOUS returned.
Merge pull request #229 from nkogteva/master

oshmem mmap: new mca parameters were introduced - sshmem_mmap_anonymous,...