FIX: CLO-5114 - File operations: Empty URL detection added.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-3-5@16560 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
UPDATE: CLO-5114 - File operations: Throw IllegalArgumentException instead of NPE for empty input.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-3-5@16561 a09ad3ba-1a0f-0410-b1b9-c67202f10d70