blueprint cisco-plugin-exception-handling

Improvements to exception handling in the Cisco plugins. Changes
include:

- Added mapping of Cisco exceptions to HTTP codes
  (extension to FAULT_MAP).
- Removed several unused Cisco exception definitions.
- Added several new Cisco exceptions for fault conditions.
- Added several rollbacks for various sequential operations, e.g.:
  * Create port: Nexus sub-plugin fails after OVS sub-plugin success
  * Create port: Nexus switch conig fails after adding binding to
                 Nexus binding database
  * Delete port: OVS sub-plugin fails after Nexus sub-plugin success
- Delete Port: Reversed order of OVS/Nexus sub-plugin calls so that
  it is done in the reverse order as is done for create port.
- Removed several empty except/raise blocks
- Delete network: Removed call to Nexus sub-plugin delete_network,
  since that is a no-op.
- Removed a block of unused code in model's create_network method.
- Added several unit testcases, including patching of OVS, Cisco
  and Nexus config.
- Remove CISCO_TEST configuration from cisco plugin
  config .ini file.

Change-Id: Iabdf4842aa2f0b090a90e2c565848290832b5197
update-port error if port does not exist in nvp

Previously the NVP plugin would query NVP for the quantum port id that was
stored in the port as a tag in NVP. Later, a look up table was added in order
to directly look up the ID without having to go to NVP. The problem that can
arise is that if a port was created in folsom before this lookup table was
added and then deleted from NVP directly an error will be raised when calling
update_port(). This patch fixes this potential problem.

Fixes bug 1172006

Change-Id: I08c74e305449f7fe32897abf43ceb430c959b02d
Log msg for load policy file only if the file is actually loaded

The Load entry was previousy in init(), whereas it should have
been in _set_rules() which is invoked only when policies are
(re)loaded from the json file.

Change-Id: Ib4ce66569a64fc4be8f5f77d7f503cc93ac0006e
Calculate nicira plugin NAT rules order according to CIDR prefix

Bug 1176947

Change-Id: Ibe81b9905cacea51d954416588f5c50d6337bbb0
Update import of oslo's processutils.

Brings processutils inline with the current state of oslo.

Change-Id: I9f34a2d2acc527c438ecb3466d77b2f2775f2e00
Validate that netaddr does not receive a string with whitespace

Fixes bug 1177277

Change-Id: Ibecaeed3e5918b06e74d8fa68cbe443bcbada7fc
Imported Translations from Transifex

Change-Id: Ieed02d3f78c8073d659d5ed3c085f9b5582415c1
Merge "Imported Translations from Transifex"
Merge "update-port error if port does not exist in nvp"
Merge "Update import of oslo's processutils."
Merge "Validate that netaddr does not receive a string with whitespace"
Merge "blueprint cisco-plugin-exception-handling"
Merge "Calculate nicira plugin NAT rules order according to CIDR prefix"
Merge "Log msg for load policy file only if the file is actually loaded"