- Added the possibility of installing the platform-independent files in the
   platform-specific directory in the InstallArea.
   The new behavior is disabled by default at the moment, and it can be enabled
   with the CMT extra tags 'no-shared-dir' (always disabled for ATLAS).
 - Improved run_qmtest.py to be able to run the tests from a read-only location
   even if the "QMTest" directory is not present.
   The QMTestTestsDatabase action is not executed anymore during the build
   since it is not needed.
 - Modified "loadConfigurableDb" to be able to find *_merged_confDb.py in any
   subdirectory of the InstallArea (needed to be able to install platform-
   independent files in the platform-specific directories, see GaudiPolicy).


git-svn-id: svn+ssh://svn.cern.ch/reps/gaudi/Gaudi/trunk@6276 53ecefc3-a64d-0410-9bdf-b8581fa3287e