CTL test suites cannot be executed using the all-in-one jar files.

[bpross-52n]

Is your feature request related to a problem? Please describe.
CTL test suites cannot be executed using the all-in-one jar files. This is due to the fact that the CTL scripts are currently loaded from the file system. Loading them from within the all-in-one jar files will not work with the current approach.

Describe the solution you'd like
CTL test suites can be executed using the all-in-one jar files. The loading mechanism needs to be modified to also be able to load files contained within the all-in-one jar files.

This is related to opengeospatial/ets-wms13#120