Merge pull request #74 from kpartlow/master

sys.classpath is added in, some missing tests and incorrect tests are now corrected.
- removed commented out code
- classpath now loaded (established) when the first attempt to get a cube from database occurs.
- classpath cleared if sys.classpath renamed or updated.
Changed environment in test to match sys.classpath requirement for 'env'
Added ApplicationId to base NCubeGroovyExpression