BUG: Fix qSlicerLoadableModuleWithPythonTest

To fix the failing test due to a regression introduced by r23828,
this commit
(1) updates CTK to include update to ctk/init.py
(2) update slicer/init.py
to ensure "slicer" module can be imported without an instantiated
(3) update launcher settings associated with CTK external project to
allow ctk module to be imported without having a qSlicerCoreApplication
instantiated. (See function "pythonPaths" at line 65 of
qSlicerCorePythonManager.cpp)
QApplication.

CTK changes:

$ git shortlog a3d8aa9..e23537d --no-merges
Andreas Fetzer (32):
Use same way to display data like in the ctkXnatTreeModel
Make root object protected to allow access to the root object from within subclasses.
Use lower case property keys consistently.
Use label instead of abstractresourceid since a newly generated resource may not have an id yet
Fixed resource uri for ctkXnatFile
Added new file which contains all the xnat object fields that are accessible via the xnat rest api
Use properties for fields that are accessible via the rest api instead of members of the private implementation. Use the object field constants for accessing the properties.
Use constants for accessing the properties of an object
Use constants for accessing the properties of an subject
Use constants for accessing the properties of an xnat object
Added convenience methods for setting file properties
Added missing includes
Use constant for accessing properties
Added functions for getting/setting the description of a project
The description which is displayed as a tooltip by the Tree- and TableModel must not be synchronized with the XNAT server. Hence it should be a member of the private implementation
Don't store the ID within a property. Since the ID is created automatically and cannot be changed afterwards it should be stored as a field of the private implementation.
Added convenience methods for setting xnatScan properties
Overwrote the ID and name accessors for xnatResource
Fixed return type
Fixed fetching xnatObjects by using the correct properties/fields
Reverted changes regarding ID handling. ID is no longer stored within the private implementation but as property again. Overwrote ID getters and setter where this was necessary.
Added get/set label methods to xnatResource, since the xnatResource object has no field name.
Fixed access to reconstruction file names
Removed debug messages
Fixed property access
Stylistic improvements
Made id getter and setter virtual
Added more missing virtual declarations
Fixed compiler warning. No longer returning reference to local temporary object.
Removed file with xnat constants. The respective constants are now located in the according xnat object implementation
Removed unused includes
Removed commented-out legacy code

Ivo Wolf (1):
Refactored and extended download

Jean-Christophe Fillion-Robin (1):
BUG: Allow ctk to be imported if neither Core or Widget kit are loaded

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23914 3bd1e089-480b-0410-8dfb-8563597acbee