ucma_ib_init() was removed from ucma_init() to avoid
recursive callback issues when using the librspreload
library over rsockets. Although rsockets calls ucma_ib_init,
other pieces of the code do not. The result is that
ibacm ends up being disabled unless rsockets has been
used. Fix this by calling ucma_ib_init() where needed.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>