Merge pull request #83 in CASA/casa6 from casaTestHelper to master
* commit '685ec2a7bf277d11ef4660722a58b20d24044885':
remove casatools and casatasks dependencies
Add restfreqtool to casatestutils. Bug Fix in imagetesthelpers
Add casatestutils to CASA5
Adding testhelper scripts as their CASA5 names. Although not in pep8 format, it'll make testing CASA6 transition easier
updated casaTestHelper to casatestutils for formatting and organization
change for casa5 point to correct version of tbtool in casa5
initial commit of casaTestHelper
