Added regression testing script
Fixed regression causing breakage for X9 images.
Tested on following images:
Pass:
SMT_312.bin	     SMT_X10_154.bin  SMT_X10_170.bin  SMT_X10_180.bin
SMT_313.bin	     SMT_X10_159.bin  SMT_X10_171.bin  SMT_X10_161.bin
SMT_X10_172.bin      SMT_X9_317.bin   SMT_X10_135.bin  SMT_X10_164.bin
SMT_X10_174.bin      SMT_X9_321.bin   SMT_X10_142.bin  SMT_X10_166.bin
SMT_X10_175.bin      SMT_X10_143.bin  SMT_X10_167.bin  SMT_X10_176.bin
X10_IPMI_FW_1.13.bin SMT_X10_150.bin  SMT_X10_169.bin  SMT_X10_177.bin

Fail:
SMT_X9_315.bin       SMT_X9_331.bin   SMT_X10_109.bin