LU-7042 lnet: Handle OFED 3.18 packaging definitions

LU-7042 lnet: Handle OFED 3.18 packaging definitions

Starting with OFED 3.18 the OFED package started to use config.h
provided by autoconf tool. This lead to clash between PACKAGE_*
macros which are defined in OFED and Lustre headers.

Also dealing with kernels that have lustre enabled already
required to undefine the common macros that used by in-kernel
Lustre client and this sources.

This fix undefine all symbols that are generated by Lustre autoconf
to avoid conflicts with kernel defines or OFEDs. They are undefined
right before new definition in config.h. The list of symbols to undef
is automatically generated by autoconf and should not be extended in
the future.

Also undefine clashed macros in autoconf checks.

Change-Id: I0d93adac19573328e905ba536db0dbd842ed2aab
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: http://review.whamcloud.com/16418
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>