OSHMEM: spml ikrit: add skew to connect/disconnect

Each pe connects/disconnects starting from itself instead of pe=0. This
will distribute network traffic in a more friendly way.
(cherry picked from commit 428add390ead3f467a0613313911e9b57ff64ed6)
Merge pull request #104 from alex-mikheev/topic/ikrit_skew_connect-v1.8

OSHMEM: spml ikrit: add skew to connect/disconnect