ENH: Force sequential ordering of BRAINSCut tests

BRAINSCut share many files between tests, so provide
explicit serial processing of the tests to make the
tests suite pass reliably.
ENH: add fine grained execption catching.

The global exception catching needed more fine grained isolation
to determine what was really happening.
ENH: Cleanup JPEG compiler warnings.

Provide a set of compiler warning suppressions to help clean up the
BRAINSTools dashboard.