Various changes for checking if a vector is empty or not.

Extended Cxx test TestSuite to have a skipTests() method.
Using the ICat Login algorithm to test the connection. There is probably a better way (this is a little slow).

I was a bit lazy on my regex for getting the version number. So on Mac
it would pick up the trailing LLVM version for the gcc version.  Now I
am cutting the version string short so this doesn't happen….hopefully.