Spawn arping in thread to speed-up floating IP

Change _send_gratuitous_arp_packet() to spawn a thread to call
arping after a floating IP is assigned.  This way it doesn't
stall _process_routers() from returning quickly due to calling
pool.waitall().

Fixes Bug: 1233391

Change-Id: Id1f5eb75c222ba6a0935a294e3973292f50d0559
change seld into self

Closes-Bug #1242745

Change-Id: If5cc2864dc966eacd4cf30757fd1de15d9992629
change NetworkVxlanPortRangeError to base NeutronException

Closes-Bug #1242756

Change-Id: I902fa12795cda5ca70defaeb3b6959e3a0824565
Update send_arp_for_ha default in l3_agent.ini

The default for send_arp_for_ha was 3 and is now 0.
This patch changes the comment in l3_agent.ini to
show the new default.

Change-Id: I77370350ffee6ad7b94aa7db341c062ebc0b7d89
Merge "Update send_arp_for_ha default in l3_agent.ini"
Merge "change NetworkVxlanPortRangeError to base NeutronException"
Fix argument mismatch failure for neutron-check-nvp-config

Use sys.argv directly.

Fix bug #1243888

Change-Id: I9cb6ca841d004baf72dd68e44be673c361c2ed05
Merge "Spawn arping in thread to speed-up floating IP"
Fix TypeError: <MagicMock name='LinuxBridgeManager().local_ip'

This patch fixes an error that does not result in a test failure but
causes the following error to be logged in the test logs:

TypeError: <MagicMock name='LinuxBridgeManager().local_ip' id='666599248'>
is not JSON serializable

Related-Bug: #1234857

Change-Id: I65cdd997745d8b760031f8f32e3c10682ad2288e
change assertEquals to assertEqual

According to http://docs.python.org/2/library/unittest.html
assertEquals is a deprecated alias of assertEqual.

Change-Id: I4030e9f9b184af60eb9253b3a1d7e1cc929d502d
Imported Translations from Transifex

Change-Id: Iacabec05e369340634cd36231d4e2ced64e0543c
Updated from global requirements

Change-Id: Ifbcffab245f7dee50f5a84489011e220a3f8fea8
Merge "Imported Translations from Transifex"
Merge "Fix TypeError: <MagicMock name='LinuxBridgeManager().local_ip'"
Merge "Updated from global requirements"
Merge "Fix argument mismatch failure for neutron-check-nvp-config"