Unit test for bug #1355: a builder is not retrieved from the input IChemObject.

Change-Id: I7f2483c9b0bc4ea2acc0fbcb49999cc656b49936
Signed-off-by: John May <john.wilkinsonmay@gmail.com>
Fixes bug #1355: create a new builder from the passed IChemObject

Change-Id: I6fa8066032a0671bfda9eb92fd96ec8b4ae95845
Signed-off-by: John May <john.wilkinsonmay@gmail.com>