Merge pull request #12 from italiangrid/fix/STOR-505

Fix for STOR-505
Improved error reporting for SpaceHelper.
Merge pull request #15 from italiangrid/fix/STOR-515

Improved error reporting for SpaceHelper.
Merged with branch 'develop'

Conflicts:
	src/main/java/it/grid/storm/space/SpaceHelper.java