This bug is from path[1], when we use manila client to create
a share type or share group type, the is_default value is always
empty, so add the is_default value when we create each share type
or share group type.
Closes-bug: #1743941
[1] Ib264d8422fe57701f990cbbf7ea5d1e90b8b0008
Change-Id: Ia8bcb632591fc0b5438847b22ec59c2039ecf5f1