ibacm: open only prov endpoints with name/addr configured

ibacm: open only prov endpoints with name/addr configured

This patch modifies the ibacm core so that it will request the provider to
open those endpoints that have been assigned with at least one name or address.
This change will avoid unnecessary endpoint open and close for those without
any name/address configured by the administrator.

Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>