Task #9898: Added find_python_module for the external (pip) modules

MAC/Services/src/CMakeLists.txt

 # $Id$
 
+include(FindPythonModule)
+
+find_python_module(fabric REQUIRED)
+
 lofar_add_bin_scripts(
   pipelinecontrol
   observationcontrol2

MAC/Services/test/CMakeLists.txt

 # $Id$
 
 include(LofarCTest)
+include(FindPythonModule)
 
 lofar_find_package(Python REQUIRED)
 
+find_python_module(mock REQUIRED)
+
 lofar_add_test(tPipelineControl)