Remove unused imports in db package

Change-Id: I55b2d113ad667745652e00d11b0dabac4a42324f
Upgrade WebOb to 1.2.3

The version of WebOb being used in OpenStack was more than
1 year old. This change updates to the latest stable release.

Upgrading WebOb resolves a version conflict between OpenStack
and Pecan, the web framework used by the Ceilometer team for
version 2 of the ceilometer API.

Refer to http://docs.webob.org/en/latest/news.html
for the list of changes between 1.0.8 and 1.2.3.

Fixes Bug #1092227

Change-Id: I07707607ae2067a567e11c347cddda9c7e6bcef7
Merge "Remove unused imports in db package"
Enable tenants to set non-owned ext network as router gateway

Bug 1087243

Avoid loading external networks subnets in tenant's context, as this
might lead to the subnet not being found because it's owned by a
different tenant

Change-Id: Ic4c429c9e667da939ede0aa07a12c0f5a17e212c
Merge "Upgrade WebOb to 1.2.3"
Merge "Enable tenants to set non-owned ext network as router gateway"
sql_dbpool_enabled not passed to configured_db nvp_plugin

Introduced in 7b5f6fd6. Fixes bug 1095856

Change-Id: I34cca7cb489013b033a7426b37bbf9989f87e7ec
Remove unused imports in debug package

Change-Id: I1fa599e38be86025d69649f8653f4ee28c6f3198
Merge "sql_dbpool_enabled not passed to configured_db nvp_plugin"