Cleaned up heap-allocated objects is qtie.cpp main routine that was causing a...

Cleaned up heap-allocated objects is qtie.cpp main routine that was causing a segfault because of the new Qt5 libraries IPCE uses.  Fixes #4471

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@7179 41f8697f-d340-4b68-9986-7bafba869bb8