Fix incorrect indentations found by Pep 1.4.6+

Pep 1.4.5 had several bugs with checking indentation of
hanging and nested sets. Fix fallout.

Change-Id: Ibcb1679e0bd283feb3c1568ba214bc525575fd43
Fix required enum's name in migration

Enums must contain name parameter for PostgreSQL and need to be
deleted after dropping table.

Closes-Bug: #1243652
Closes-Bug: #1243213

Change-Id: I01d18ff25572bbe9e6a8b8c6ae27f250ab154734
Modified configuration group name to lowercase

Most of the OpenStack project makes use of lower case for
configuration group names. But, 'neutron' was having group
names in either cases. Bug states it is fine to have group
name in upper case for [DEFAULT] but needs to be changed
for others. It was noted that [PLUMgridDirector] was having
characters.

Change-Id: I95f2dad6d5ae17f722202f4917b6ef460cd41e15
Closes-Bug: #1176683
Merge "Fix incorrect indentations found by Pep 1.4.6+"
Merge "Modified configuration group name to lowercase"
Merge "Fix required enum's name in migration"