Small cleanups for fabtests

Add error and debugging macros to shared.h, use them in shared.c

Remove unused includes

Signed-off-by: pmmccorm <patrick.m.mccormick@intel.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Merge pull request #64 from shefty/master

Small cleanups for fabtests