ENH: Add a registration test for LBFGS-B optimizer

A new test is added that uses LBFGSB optimizer in the ITKv4
registration framework. Some issues are fixed to make the new test
successfully passed.
Also, duplicated examples from ITKv3 are removed. This avoids failures
while creating the ITK software guide.

Change-Id: I1620f03febc011e20b4558da020f7969a34bcbcf
Merge topic 'AddLBFGSv4_both_4'

d513d36d ENH: Add a registration test for LBFGS-B optimizer