Fixed auth on read, update, delete on networks

RM9709
RM9837

Adds support for Redis sentinels
Merge pull request #239 from Cerberus98/master

RM9725 update
Create port with fixed_ips with ip_address optional

RM9839
Merge pull request #240 from sumanthns/fixed_ip_with_just_subnet

Create port with fixed_ips with ip_address optional
Merge pull request #236 from asadoughi/9709

Fixed auth on read, update, delete on networks
remove test_models_sync migration test

Because these unit tests run against SQLite, it blocks
us using the more advanced features of modern, more
robust SQL data stores. Removing this test will prevent
this limitation from blocking us.
Merge pull request #241 from Cerberus98/rm9837_work

RM9837
Merge pull request #242 from TMaddox/remove_test_migrations_sync

remove test_models_sync migration test
RM9898

Adds redis SSL support.