[ewg] management master git repository

[Sasha Khapyorsky]

Hi All,

Please note that due to maintainership transfer "master" of OFA
management userspace tree (OpenSM, infiniband-diags) is located at:

  git://git.openfabrics.org/~sashak/management

All OpenSM, Diags, libibumad and libibmad upstream changes will be
committed into this repo.

'ofed_1_2' branch exists too, but since there were no changes in last
days it is identical to one in ~halr/management.

I updated OFA wiki pages accordingly.

Sasha