Added multipleSensors test for testing observations and usepvl parameters....

Added multipleSensors test for testing observations and usepvl parameters. Removed redundant case01 test, renamed obsmode_cholmod_sparse to camsolveAll. Fixes #4122.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@7054 41f8697f-d340-4b68-9986-7bafba869bb8