minor fixes to base.py: pep8/whitespace + remove DB2 stuff
minor fixes to base.py: pep8/whitespace + remove DB2 stuff

guillaume-philippon/aquilon,stdweird/aquilon,stdweird/aquilon,stdweird/aquilon,quattor/aquilon,quattor/aquilon,guillaume-philippon/aquilon,quattor/aquilon,guillaume-philippon/aquilon