Reduce plugin accesses from policy engine

Bug 1179745

This patch introduces a new type of check whose aim is to fetch
the parent resource's owner only when a rule that explicitly needs
it needs to be checked.

Change-Id: I1ff429eb3f92b35bcb9b4c4e01b65f8c0a595f48
Improve readability for nvplib error messages.

Fixes bug #1189683

Change-Id: Idaf8e072291af2f08df6a502f1d87ee350aab0af
Fix branch in db migration scripts

Fixes bug 1190942

Change-Id: I9eea3988518694922130992b547dc19768e0d005
Imported Translations from Transifex

Change-Id: I00bce7b7069d0ff8f2d62633b502103bd5e62abd
set default for gw conn info in nvp_networkgw extension

Bug 1183285

This patch simply guarantees default segmentation type and
id in gateway connection info for the 'connect' and 'disconnect'
actions are correctly set respectively to 'flat' and 0.

Change-Id: I1b4e8274651e05f4681878ab70daef990ece901b
Enable attribute-based policy on router:external_gateway_info

Bug 1186081

This patch also removes a check on is_write in policy.py since
the code block where that check is placed assumed already that
is_write == True

Change-Id: I21c54f63e1948675f67afb088c262dc5316c230d
Rename agent_loadbalancer directory to loadbalancer

Fix missing path changes

Fixes bug 1179276

Change-Id: I889eeac8013de67fccbac9bfa745a56e7f859756
Merge "Reduce plugin accesses from policy engine"
Imported Translations from Transifex

Change-Id: Iacf83194136e2d01945e5ef080d0458b942751f1
Remove code duplication from loadbalancer db plugin

Use _get_resource instead of duplicating code that fetches pools

fixes bug 1191406

Change-Id: I380c97a2ece0536b49891ac797ec7170e44a6a20
Merge "Rename agent_loadbalancer directory to loadbalancer"
Merge "Fix branch in db migration scripts"
Merge "Imported Translations from Transifex"
Merge "Remove code duplication from loadbalancer db plugin"
Merge "Enable attribute-based policy on router:external_gateway_info"
Merge "set default for gw conn info in nvp_networkgw extension"
Imported Translations from Transifex

Change-Id: Ia89635fa01778f8d4ae8695fce2e6dbd264ebd37
Update to the latest stevedore

Use a version of stevedore that does not try to
install distribute.

The requirements change is in https://review.openstack.org/#/c/32738/

Change-Id: If39d886cb68044871617600650ef8546635143bc
Merge "Update to the latest stevedore"
Require pbr 0.5.16 or newer

Use a version of pbr greater then 0.5.15. Earlier versions have problems
when alpha tarballs are used as dependencies.

Fixes bug 1191155

Change-Id: I889358ae746761b282c5933c53bce10017be4c57