The inverse correlation matrix file, inverseMatrix.dat, is no longer generated...

The inverse correlation matrix file, inverseMatrix.dat, is no longer generated when running jigsaw. Fixes #4315.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@7152 41f8697f-d340-4b68-9986-7bafba869bb8