Adds pseudo-folder creation

Users can create pseudo-folders independent of object upload

Implements: blueprint swift-pseudo-directory
Change-Id: I5797ae9aab83135643680a410b2394165dc55271
Validate volume size is larger than image minDisk

Creating volume from image currently validates that the volume size
must be larger or equal to the image size. If the Image has a minDisk
size configured, the volumen size must also be larger or equal to the
minDisk.

Took the opportunity to clean up the parenthesis in some localized
messages as well.

Change-Id: I0ae99504c1ae7a9c0b7dda5b3307602c48b0a6a8
Closes-bug: 1241253
Removed "NT_" prefix in network topology tables

Normalized table names in network topology. Files that have been modified:

openstack_dashboard/dashboards/project/network_topology/instances/
tables.py
openstack_dashboard/dashboards/project/network_topology/ports/
tables.py
openstack_dashboard/dashboards/project/network_topology/routers/
tables.py

Change-Id: I60895fd1872f7026ceb5c027c1346343e241d47b
Closes-Bug: #1254484
Merge "Removed "NT_" prefix in network topology tables"
Merge "Adds pseudo-folder creation"
Merge "Validate volume size is larger than image minDisk"