LU-12575 build: add ibutils2 for MOFED build

LU-12575 build: add ibutils2 for MOFED build

MOFED 4.6 include ibutils2 instead of ibutils
Remove ofed rhel5 patch which we don't need

Lustre-change: https://review.whamcloud.com/35590
Lustre-commit: 26444d84c74e693e47c9785423e63402d32acb4f

Change-Id: I46c51eb8a194ea86bd8c951944e5c1427d0f37d0
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/35631
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>