FIX: CLO-4677 - File operations: Throw better exception if listing a directory without POSIX "execute" permission.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16338 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
UPDATE: CLO-4677 - File operations: LocalOperationHandlerTest.testList() enhanced.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16339 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
UPDATE: CLO-4677 - File operations: AbstractOperationHandlerTest.testList() fixed.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16343 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
FIX: CLO-4677 - File operations: symbolic link handling fixed.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16344 a09ad3ba-1a0f-0410-b1b9-c67202f10d70